368 Free Online Data Tools - JSON, CSV, YAML, XML, SQL

Recommended workflows

Schema MapperMap source fields to a target schema with confidence scores.
Dataset Health AnalyzerScore CSV health across missing values, duplicates, row shape, and type consistency.
Missing Data ReportAnalyze missing values by column and row with CSV, heatmap, and markdown outputs.
CSV CleanerAuto-detect and fix common CSV issues.
JSON FormatterPretty-print, minify, and indent JSON safely.
SQL Query AnalyzerInspect a query: tables, joins, projections, filters.

Popular tools

JSON → CSVConvert a JSON array of objects into clean CSV.
CSV → JSONParse CSV into JSON — with header detection.
JSON ↔ YAMLConvert between JSON and YAML in either direction.
JSON FormatterPretty-print, minify, and indent JSON safely.
JSON ValidatorValidate JSON syntax with helpful error messages.
CSV → ChartsRender quick charts from a CSV.
Universal Data LabDrop in any CSV/JSON/Excel/XML — auto-detect, profile, clean, visualize, export.
JSON WorkspaceOpen any JSON, browse, search, edit, and export — all in one workspace.

All matching tools

Compact list optimized for scanning.

.env GeneratorDevOpsBuild dotenv files with auto secret generation.Open
.gitignore GeneratorDevOpsCombine gitignore templates for Node, Python, Java, and more.Open
Add Page Numbers to PDFPDFStamp page numbers at the bottom of every PDF page.Open
Address CleanerCleaningStandardize address strings — case, abbreviations, components.Open
AES EncryptorSecurityAES-GCM-256 encryption with PBKDF2 key derivation.Open
Age CalculatorCalculatorsExact age in years, months, days, weeks, and hours.Open
Aggregation BuilderSQL & DBBuild GROUP BY / HAVING / window aggregations visually.Open
AI Column MapperAI-AssistedMap fields between two datasets with AI.Open
Apache Log ParserLogsParse Apache access logs into structured rows.Open
API Field MapperAPIMap fields between two API shapes.Open
API Response FormatterAPIPretty-print and inspect API JSON.Open
API Schema ExtractorAPIInfer a schema from sample responses.Open
Argon2 GeneratorSecurityGenerate and verify Argon2id password hashes in your browser.Open
Attendance CalculatorCalculatorsAttendance percentage plus how many classes you can skip.Open
Auto Data Repair SuggestionsAI-AssistedScan a dataset and suggest fixes — types, nulls, formats.Open
Auto Schema DetectorSchema & MetadataInfer a schema (types, nullability, uniqueness) from any sample dataset.Open
Auto-Clean DatasetAI-AssistedOne-click dataset cleaning suggestions.Open
Barcode GeneratorGeneratorsGenerate Code128, EAN, UPC, and other 1D barcodes as SVG.Open
Base ConverterDeveloperConvert between binary, octal, decimal, hex, base32, base36.Open
Base64 Encoder/DecoderDeveloperEncode plain text to Base64 or decode Base64 — UTF-8 safe.Open
Batch ConverterBig DataConvert many files in one go.Open
BBCode ConverterDeveloperConvert between BBCode and HTML in both directions.Open
bcrypt GeneratorSecurityGenerate and verify bcrypt password hashes with a chosen cost.Open
Binary CalculatorCalculatorsArithmetic and bitwise operations on binary numbers.Open
Binary ViewerFilesView the raw bits of any file alongside ASCII.Open
BMI CalculatorCalculatorsBody mass index with category and ideal weight range.Open
BMR CalculatorCalculatorsBasal metabolic rate and TDEE via Mifflin-St Jeor.Open
Breadcrumb Schema GeneratorWeb & SEOGenerate BreadcrumbList JSON-LD for SEO.Open
Business Days CalculatorDate & TimeCount working days (and weekends) between two dates.Open
Canonical Tag GeneratorWeb & SEOGenerate a rel=canonical link tag to avoid duplicate content.Open
CGPA CalculatorCalculatorsAverage GPAs across multiple semesters into a CGPA.Open
Character CounterDeveloperCount characters, words, sentences, lines, and reading time.Open
CIDR CalculatorNetworkTurn a CIDR block into its address range, mask, and host count.Open
Citation GeneratorResearchFormat references in APA, MLA, Chicago, and Harvard styles.Open
Collapsible Tree ViewerBig DataRender any JSON as an interactive collapsible tree.Open
Color Palette GeneratorWeb & SEOGenerate shades and harmonies from a base color.Open
Color PickerDeveloperPick a color and copy in HEX, RGB, HSL.Open
Column AnalysisAnalysisType, range, nulls for every column.Open
Column Relationship DetectorSchema & MetadataSpot foreign-key candidates and 1:1 / 1:N relationships.Open
Column SplitterSpreadsheetsSplit a column by delimiter into multiple.Open
Column StatisticsAnalysisMin/max/mean/median/stddev/quartiles for every numeric column.Open
Compare PDFsPDFFind added and removed text lines between two PDFs.Open
Compound InterestCalculatorsProject growth with compound interest.Open
Compress PDFPDFShrink PDF file size by re-serializing with object streams.Open
Conditional FormattingSpreadsheetsGenerate conditional-formatting rules.Open
Contrast CheckerWeb & SEOCheck WCAG AA/AAA color contrast for accessibility.Open
Convert Data TypesETLRecast columns: string ↔ number ↔ date.Open
Cookie GeneratorAPIBuild Set-Cookie header strings.Open
Cookie ParserAPIParse Set-Cookie and Cookie header strings.Open
Correlation MatrixAnalysisPairwise correlations between numeric columns.Open
CORS Header GeneratorDeveloperBuild Access-Control-* response headers from a form.Open
Countdown TimerDate & TimeLive countdown to any future date and time.Open
Credit Card Format CheckerValidationValidate card number format and Luhn check.Open
Cron BuilderDeveloperBuild cron expressions from presets and field breakdowns.Open
Cron ValidatorDeveloperValidate and describe 5-field cron expressions.Open
CSS Box Shadow GeneratorWeb & SEODesign CSS box-shadows visually and copy the code.Open
CSS Gradient GeneratorWeb & SEOBuild linear and radial CSS gradients with a live preview.Open
CSS Grid GeneratorWeb & SEOBuild CSS grid layouts with columns, rows, and gaps.Open
CSS PreviewWeb & SEOLive-render HTML + CSS in a sandboxed iframe.Open
CSV → ChartsVisualizationRender quick charts from a CSV.Open
CSV → ExcelTransformationGenerate a downloadable .xlsx workbook from CSV.Open
CSV → JSONTransformationParse CSV into JSON — with header detection.Open
CSV → SQL InsertsTransformationGenerate INSERT statements from CSV rows.Open
CSV → XMLTransformationConvert tabular CSV into XML rows.Open
CSV Chunk SplitterBig DataSplit a huge CSV into manageable chunks.Open
CSV CleanerCleaningAuto-detect and fix common CSV issues.Open
CSV Column AnalyzerAnalysisPer-column types, ranges, uniques, nulls.Open
CSV Column FormatterFormattingAlign CSV columns visually.Open
CSV CompareComparisonRow-level diff between two CSV files.Open
CSV Duplicate FinderAnalysisSurface duplicate rows by chosen key columns.Open
CSV Filter BuilderETLBuild complex row filters across columns visually.Open
CSV MergerETLMerge multiple CSV files into one — header-aware.Open
CSV Row SearchBig DataFull-text search across every cell of a CSV.Open
CSV Sampling ToolBig DataSample N rows / X% / stratified samples from large CSV.Open
CSV SplitterBig DataSplit a large CSV into N files by row count, by value, or by hash.Open
CSV Structure ValidatorValidationCatch ragged rows and quoting issues.Open
CSV ViewerBig DataOpen and browse any CSV — sortable, filterable, searchable.Open
CSV WorkspaceWorkspaceOpen any CSV, profile columns, filter rows, edit cells, export.Open
Currency StandardizerCleaningNormalize currency strings ("$1,200.50" → 1200.50 USD) across rows.Open
Curve Fitting CalculatorCalculatorsLeast-squares line, parabola, exponential, geometric, and power curve fitting with full equation tables.Open
Data Contract TesterETLValidate CSV datasets against required fields, types, uniqueness, ranges, and regex rules.Open
Data Dictionary GeneratorSchema & MetadataGenerate a markdown / CSV data dictionary from any dataset.Open
Data Distribution ViewerAnalysisHistograms / KDE per column with quick outlier flags.Open
Data Filter ToolSpreadsheetsBuild complex filters across columns.Open
Data Masking ToolSecurityMask sensitive fields in a dataset.Open
Data StandardizerCleaningNormalize a column to a chosen format (e.g. dates, currencies, casing).Open
Data Type DetectorCleaningInfer each column's data type.Open
Data Validation PipelineETLChain validators on a dataset and surface row-level failures.Open
Dataset Diff CheckerComparisonFind missing or changed records.Open
Dataset Health AnalyzerAnalysisScore CSV health across missing values, duplicates, row shape, and type consistency.Open
Dataset Insight GeneratorAI-AssistedAuto-surface notable findings in a dataset.Open
Date CalculatorDate & TimeAdd or subtract days, weeks, months, or years from a date.Open
Date DifferenceDate & TimeDifference between two dates in years, months, days, and weeks.Open
Date Format NormalizerCleaningParse messy date strings and emit ISO-8601 (or any chosen format).Open
Delete PDF PagesPDFRemove specific pages or ranges from a PDF.Open
Detect Corrupted RowsCleaningSpot rows with shape or type mismatches.Open
Discount CalculatorCalculatorsCompute discounted price and savings.Open
Disposable Email CheckerEmailCheck whether an email uses a known throwaway domain.Open
Distribution AnalysisAnalysisSkewness, kurtosis, histogram per column.Open
DIU Cover Page BuilderCover PagesMake a Daffodil International University assignment or lab-report cover page — edit a live A4 preview, then print or download a PDF.Open
DKIM Key GeneratorEmailGenerate an RSA-2048 DKIM key pair and DNS record in your browser.Open
DMARC Record GeneratorEmailBuild a DMARC policy TXT record with reporting addresses.Open
Dockerfile GeneratorDevOpsGenerate a minimal production-ready Dockerfile.Open
Drag & Drop Chart BuilderVisualizationDrag a column onto X / Y / color and a chart appears.Open
Duplicate AnalysisAnalysisQuantify exact and near-duplicates.Open
Duplicate FinderSpreadsheetsHighlight duplicate rows in a sheet.Open
Duplicate Line RemoverDeveloperRemove duplicate lines while keeping first or last occurrence.Open
Dynamic FiltersVisualizationLive filters across all charts on a multi-chart canvas.Open
Email ExtractorExtractionPull every email address from any text.Open
Email Header AnalyzerEmailParse raw email headers — SPF/DKIM/DMARC results and delivery hops.Open
Email Signature GeneratorEmailBuild a clean HTML email signature you can copy.Open
Email ValidatorCleaningBulk-validate a list of email addresses.Open
EMI CalculatorCalculatorsEquated monthly installment, interest, and total payable.Open
Empty Line RemoverDeveloperRemove blank lines, collapse extra blanks, and trim lines.Open
ER Diagram GeneratorSQL & DBGenerate an ER diagram from CREATE TABLE statements.Open
Error Log AnalyzerLogsGroup errors and surface hot spots.Open
Error Pattern DetectorLogsGroup log lines by signature; surface error spikes.Open
ETL BuilderETLUpload, transform, map, and export visually.Open
ETL StudioETLDrag-and-drop ETL canvas: upload, transform, map, merge, export.Open
Excel → CSVTransformationConvert .xlsx sheets into CSV — reads every sheet in your browser.Open
Excel → DashboardVisualizationTurn a spreadsheet into a small dashboard.Open
Excel → JSONTransformationRead .xlsx and emit JSON per sheet (objects or arrays).Open
Excel Column ProfilerSpreadsheetsPer-column types, nulls, and uniqueness for every sheet.Open
Excel Multi-Sheet ViewerSpreadsheetsOpen every sheet of an .xlsx file and switch between them.Open
Excel Sheet ViewerSpreadsheetsOpen .xlsx files directly in the browser — sortable, searchable.Open
Excel WorkspaceWorkspaceOpen multi-sheet Excel — browse, profile, visualize, and export each sheet.Open
Extract PDF PagesPDFPull selected pages or ranges into a new PDF.Open
Fake Address GeneratorGeneratorsGenerate fake postal addresses for testing.Open
Fake Data ReplacerSecurityReplace real fields with realistic fakes.Open
Fake Dataset GeneratorSQL & DBRealistic seed data on demand.Open
Fake User GeneratorGeneratorsGenerate fake user profiles (name, email, phone, age).Open
FAQ Schema GeneratorWeb & SEOGenerate FAQPage JSON-LD for rich-result FAQs.Open
File Checksum GeneratorSecurityVerify file integrity with SHA-1/256/512 in your browser.Open
File DecryptorSecurityDecrypt .dxf files produced by the File Encryptor.Open
File EncryptorSecurityEncrypt any file with a passphrase using AES-GCM 256 — fully offline.Open
File Signature CheckerFilesIdentify a file's true type by its magic bytes.Open
Filter RowsETLFilter rows by predicate.Open
Fix Broken JSONCleaningRepair trailing commas, single quotes, comments.Open
Flashcard GeneratorResearchTurn question/answer lines into flippable study flashcards.Open
Flatten PDFPDFFlatten form fields and annotations into static page content.Open
Flexbox GeneratorWeb & SEOVisually build flexbox layouts and copy the CSS.Open
Formula GeneratorSpreadsheetsBuild Excel & Google Sheets formulas — 30+ functions with parameters and explanations.Open
Formula InspectorSpreadsheetsTrace and explain Excel formulas — functions, references, parse tree, error checks.Open
Frequency DistributionAnalysisValue-count tables for categorical columns.Open
GPA CalculatorCalculatorsCompute semester GPA from grade points and credits.Open
GST CalculatorCalculatorsAdd or remove GST from any amount.Open
HeatmapsVisualizationVisualize a matrix as a heatmap.Open
Hex CalculatorCalculatorsArithmetic and bitwise operations on hexadecimal numbers.Open
Hex ViewerFilesView any file as a classic offset / hex / ASCII dump.Open
HistogramsVisualizationPlot the distribution of a numeric column.Open
Hreflang GeneratorWeb & SEOGenerate hreflang alternate link tags for i18n SEO.Open
HTML Entity Encoder / DecoderDeveloperEncode or decode HTML entities — named and numeric.Open
HTML PreviewDeveloperLive-render HTML in a sandboxed iframe as you type.Open
HTTP Status LookupDeveloperReference for all HTTP status codes with descriptions.Open
Inconsistent Data FinderCleaningFlag inconsistent formats inside a column.Open
Indentation FixerFormattingNormalize indentation across the file.Open
INI ParserFormatsParse INI configuration into structured JSON.Open
Interpolation CalculatorCalculatorsStep-by-step Newton forward/backward, divided difference & Lagrange interpolation with full tables.Open
Invalid Row DetectorCleaningFlag rows that violate a schema or per-column constraints.Open
Investment CalculatorCalculatorsFuture value with initial and recurring contributions.Open
IP Address ValidatorValidationValidate IPv4 and IPv6 addresses.Open
IPv4 Subnet CalculatorNetworkNetwork, broadcast, host range, mask, and class from an IP + prefix.Open
IPv6 CalculatorNetworkExpand, compress, and derive the reverse-DNS of any IPv6 address.Open
ISO Date ConverterDate & TimeConvert any date to ISO 8601, Unix, UTC, and locale formats.Open
Java Model GeneratorTransformationGenerate Java POJO classes from JSON.Open
JOIN BuilderSQL & DBBuild INNER/LEFT/RIGHT/FULL joins visually with key picker.Open
Join Key AnalyzerAnalysisCompare two CSV tables and rank the safest join keys with duplicate and unmatched-rate diagnostics.Open
JOIN VisualizerSQL & DBDiagram inner/outer/left/right joins live.Open
JPG to PDFPDFCombine JPG images into a single PDF — one image per page.Open
JSON → ChartsVisualizationRender charts directly from JSON data.Open
JSON → CSVTransformationConvert a JSON array of objects into clean CSV.Open
JSON → ExcelTransformationGenerate a downloadable .xlsx workbook from JSON data.Open
JSON → Mongoose SchemaTransformationGenerate a Mongoose schema from a sample JSON document.Open
JSON → SQL SchemaTransformationGenerate SQL DDL from sample JSON.Open
JSON → XMLTransformationConvert JSON to XML.Open
JSON ↔ YAMLTransformationConvert between JSON and YAML in either direction.Open
JSON CompareComparisonSide-by-side diff of two JSON documents with structural alignment.Open
JSON FlattenTransformationFlatten nested JSON to dot-notation keys, or unflatten back.Open
JSON FormatterFormattingPretty-print, minify, and indent JSON safely.Open
JSON Key RenamerCleaningRename keys with rules (snake_case, prefix strip, mapping table).Open
JSON Log ViewerLogsBrowse structured JSON logs by field.Open
JSON MergeTransformationDeep-merge two or more JSON documents with conflict policy.Open
JSON Nested ExtractorTransformationPull a specific nested branch out of a large JSON document.Open
JSON PatchFormatsApply an RFC 6902 JSON Patch (add/remove/replace/move/copy/test).Open
JSON Path TesterTransformationTest JSONPath / jq-style expressions against a JSON document live.Open
JSON Pointer BuilderFormatsResolve an RFC 6901 JSON Pointer against a document.Open
JSON Response AnalyzerAPIInspect shape, types, and nesting.Open
JSON Schema GeneratorTransformationInfer a JSON Schema from sample data.Open
JSON Schema ValidatorValidationValidate JSON against a JSON Schema.Open
JSON SearchTransformationSearch keys and values across deeply nested JSON.Open
JSON SplitterTransformationSplit a large JSON array into N chunks or by predicate.Open
JSON ValidatorValidationValidate JSON syntax with helpful error messages.Open
JSON WorkspaceWorkspaceOpen any JSON, browse, search, edit, and export — all in one workspace.Open
JSONPath TesterFormatsQuery JSON with JSONPath — child, index, wildcard, recursive.Open
JWT BuilderDeveloperBuild and sign JSON Web Tokens locally with HMAC-SHA.Open
JWT Expiry CheckerDeveloperRead iat, nbf, and exp claims and see time until expiry.Open
JWT InspectorDeveloperDecode JWT header/payload and verify HS256/384/512 signatures.Open
Keyword ExtractorExtractionSurface the most relevant keywords.Open
KPI CardsVisualizationShow single-metric KPI cards.Open
KPI Dashboard BuilderVisualizationCompose a small dashboard out of KPI cards + charts on a CSV.Open
Large JSON ViewerBig DataBrowse multi-MB JSON without freezing the tab.Open
Leap Year CheckerDate & TimeCheck if a year is a leap year and list upcoming leap years.Open
Line ChartsVisualizationPlot time series or sequences.Open
Live CSV ParserBig DataStream a huge CSV in chunks and expose pause/resume controls.Open
Live Dashboard PreviewVisualizationEdit data → dashboard updates instantly. Great for QA.Open
Loan CalculatorCalculatorsMonthly payment, total interest, and total cost of a loan.Open
Log FormatterLogsPretty-print structured logs.Open
Lorem Ipsum GeneratorDeveloperGenerate placeholder text in paragraphs, sentences, or words.Open
Markdown PreviewDeveloperRender Markdown to HTML live, fully client-side.Open
Mean / Median / ModeAnalysisCentral tendency for numeric columns.Open
Memory Usage EstimatorBig DataEstimate browser memory cost of a dataset before loading it.Open
Merge DatasetsETLConcatenate or join two tabular files.Open
Merge PDFPDFCombine multiple PDF files into one document — free and in your browser.Open
Meta Tag GeneratorWeb & SEOGenerate HTML meta tags for baseline SEO.Open
Metadata ExtractorSchema & MetadataExtract row count, column types, file size, byte distribution.Open
MIME Type DetectorFilesSniff a file's real MIME type and compare it to the declared type.Open
MIME Type LookupDeveloperFind file extension by MIME type and vice versa.Open
Minify / Beautify ToggleFormattingSwitch between minified and pretty form.Open
Missing Data HeatmapAnalysisA heatmap that shows where the gaps are in your dataset.Open
Missing Data ReportAnalysisAnalyze missing values by column and row with CSV, heatmap, and markdown outputs.Open
Missing Value CleanerCleaningChoose a fill, drop, or interpolate strategy per column, by detected type.Open
Mongoose SchemaTransformationGenerate a Mongoose schema from JSON.Open
MySQL → PostgreSQLTransformationTranslate MySQL DDL/DML to PostgreSQL dialect.Open
NanoID GeneratorGeneratorsGenerate URL-safe NanoID identifiers with a custom alphabet.Open
Natural Language → SQLAI-AssistedGenerate SQL from a plain-English question.Open
NDJSON ViewerBig DataStream and browse newline-delimited JSON.Open
Nested JSON FormatterFormattingFormat and explore deeply nested JSON.Open
Nginx Log AnalyzerLogsSummarize Nginx access logs.Open
Normalize Column NamesCleaningsnake_case, camelCase, or kebab-case headers.Open
Null Value CleanerCleaningReplace, drop, or report null/empty cells.Open
OAuth PKCE GeneratorDeveloperGenerate a PKCE code verifier and S256 challenge pair.Open
OAuth URL BuilderDeveloperCompose OAuth 2.0 authorization URLs with PKCE support.Open
One-Click Fix PipelineETLAnalyze, repair, explain, and export a cleaned CSV dataset with before-and-after health scores.Open
Open Graph GeneratorWeb & SEOGenerate Open Graph and Twitter Card meta tags.Open
OpenGL Figure PlotterDeveloperDraw lines, circles, and polygons on a grid and get the points plus ready-to-run OpenGL C code.Open
Outlier DetectorCleaningFlag statistical outliers in numeric columns.Open
Password Entropy CalculatorSecurityMeasure password entropy in bits and estimate crack time.Open
Password GeneratorDeveloperGenerate cryptographically strong random passwords with entropy display.Open
Password StrengthDeveloperEstimate entropy and crack time of any password.Open
PBKDF2 Key GeneratorSecurityDerive keys from a password with PBKDF2 (SHA-256/384/512).Open
PDF to JPGPDFRender every PDF page to a JPG image, bundled in a zip.Open
PDF to PNGPDFRender every PDF page to a lossless PNG, bundled in a zip.Open
PDF to TextPDFExtract selectable text from a PDF, page by page.Open
PEM DecoderSecurityDecode PEM blocks to DER bytes and inspect the label.Open
PEM EncoderSecurityWrap Base64 or hex DER bytes into a labelled PEM block.Open
Percentage CalculatorCalculatorsWhat is X% of Y? X is what % of Y? Percentage change.Open
Phone ExtractorExtractionFind phone numbers in unstructured text.Open
Phone Number FormatterCleaningReformat phone numbers (E.164, national, dashed) in a CSV column.Open
Phone Number ValidatorValidationValidate phone numbers in bulk.Open
Pie ChartsVisualizationBuild a pie chart from any column.Open
PII DetectorSecurityScan tables and text for likely PII.Open
Pivot Table (Power)SpreadsheetsRich pivot tables with row/col/value/agg pickers.Open
Pivot Table BuilderSpreadsheetsBuild pivots without Excel.Open
PNG to PDFPDFCombine PNG images into a single PDF — one image per page.Open
Port LookupDeveloperLook up well-known TCP/UDP service ports.Open
Primary Key FinderAnalysisFind unique identifiers, composite keys, and almost-keys that fail due to blanks or duplicates.Open
Prisma SchemaTransformationGenerate a Prisma schema from a sample.Open
Properties File ViewerFormatsView Java .properties files as a clean key/value table.Open
Python DataclassTransformationGenerate Python @dataclass code from JSON.Open
QR Code GeneratorGeneratorsGenerate downloadable QR codes for URLs, text, and more.Open
Query Dependency GraphSQL & DBShow which tables a CTE / view depends on.Open
Random Color GeneratorGeneratorsGenerate random HEX/RGB color swatches you can copy.Open
Random CSV GeneratorGeneratorsGenerate mock CSV rows for testing — copy or download.Open
Random JSON GeneratorGeneratorsGenerate mock JSON records for testing and prototyping.Open
Random Number GeneratorGeneratorsGenerate random numbers in a range, with optional no-repeats.Open
Random Product GeneratorSQL & DBCreate fake product records.Open
Random String GeneratorDeveloperGenerate cryptographically random strings with custom charsets.Open
Random User GeneratorSQL & DBCreate fake user records (name, email, address).Open
Ratio CalculatorCalculatorsSimplify and scale ratios.Open
Regression PreviewAnalysisQuick linear / polynomial fit + R² for two columns.Open
Remove Duplicate RowsCleaningStrip duplicate rows from CSV or JSON.Open
Remove Empty FieldsCleaningDrop empty cells or null fields.Open
Rename ColumnsETLBulk-rename CSV/JSON columns.Open
Repair PDFPDFRecover and rewrite a damaged or corrupted PDF file.Open
Research Dataset VisualizerResearchQuick visualization for research data.Open
Reverse TextDeveloperReverse text by characters, words, or lines — Unicode-safe.Open
Robots.txt GeneratorWeb & SEOGenerate robots.txt directives for crawlers.Open
Rotate PDFPDFRotate every page of a PDF by 90, 180, or 270 degrees.Open
Row CountAnalysisCount rows in a dataset.Open
RSA EncryptorSecurityRSA-OAEP 2048 encrypt/decrypt. Generate key pair locally.Open
Salary CalculatorCalculatorsBreak gross salary into net annual and monthly take-home.Open
Sankey DiagramVisualizationVisualize flow between source/target columns.Open
Scatter PlotsVisualizationVisualize relationships between two columns.Open
Schema Drift DetectorSchema & MetadataCompare two CSV or JSON samples for added, removed, renamed, type, nullability, and enum drift.Open
Schema MapperSchema & MetadataMap source fields to a target schema with confidence scores.Open
Scientific CalculatorCalculatorsTrig, log, exp, powers — expression evaluator.Open
Secret ScannerSecurityScan text and code for leaked API keys, tokens, and secrets.Open
Secure NotesSecurityEncrypted note storage using AES-GCM in your browser.Open
Sensitive Data ScannerSecurityFlag credit cards, SSNs, tokens, keys.Open
SHA Hash GeneratorDeveloperGenerate SHA-1, SHA-256, SHA-384, SHA-512 hashes of text or files.Open
Shuffle LinesDeveloperRandomly shuffle the order of lines in your text.Open
SIP CalculatorCalculatorsProject a systematic investment plan maturity.Open
Sitemap GeneratorWeb & SEOGenerate a sitemap.xml from a list of URLs.Open
Slug GeneratorDeveloperGenerate clean URL slugs from any text.Open
Smart Schema DetectionAI-AssistedDetect schema and types from any sample.Open
Smart Schema MappingAI-AssistedAuto-map source columns to a target schema with confidence scores.Open
Smart Type DetectionCleaningPer-column type inference: int, float, date, bool, enum, ID.Open
Sort DataETLSort by one or more columns.Open
Sort LinesDeveloperSort lines alphabetically, by length, or naturally.Open
SPF Record GeneratorEmailBuild a valid SPF TXT record from your senders and policy.Open
Split PDFPDFSplit a PDF into one file per page, bundled as a zip.Open
SPSS CSV FormatterResearchReshape CSV for SPSS-friendly import.Open
SQL → JSONTransformationRun a query result mock and emit JSON.Open
SQL → PrismaTransformationGenerate a Prisma schema from CREATE TABLE statements.Open
SQL BeautifierFormattingReformat SQL queries with proper line breaks.Open
SQL Explain VisualizerSQL & DBPretty-render an EXPLAIN plan as a tree.Open
SQL FormatterSQL & DBToken-based SQL formatter (dialect-aware).Open
SQL Optimizer SuggestionsSQL & DBStatic heuristics: missing indexes, SELECT *, cartesian joins.Open
SQL Query AnalyzerSQL & DBInspect a query: tables, joins, projections, filters.Open
SQL Query BuilderSQL & DBBuild SELECT/JOIN queries with a form.Open
SQL Query FormatterSQL & DBFormat ugly SQL into readable layouts.Open
SQL Result CompareComparisonCompare two query result sets.Open
SQL Result ExporterSQL & DBExport a result set to CSV/JSON/Excel.Open
SQL Result VisualizerVisualizationVisualize a SQL query result instantly.Open
SQL Schema VisualizerSQL & DBBrowse tables/columns of a SQL schema interactively.Open
SQL Seed GeneratorSQL & DBGenerate INSERT seed scripts.Open
SQL Syntax ValidatorValidationLint SQL syntax across dialects.Open
SQL Table → JSONTransformationTurn a CREATE TABLE schema into JSON.Open
SSL Certificate DecoderSecurityParse and display SSL/TLS certificate fields from PEM.Open
Standard DeviationAnalysisCompute σ and variance per column.Open
Standardize Phone NumbersCleaningConvert phone numbers to a single format.Open
StopwatchDate & TimePrecision online stopwatch with lap times.Open
Structured Data ExtractorExtractionPull tables, JSON-LD, and OpenGraph blocks out of HTML.Open
Subnet CalculatorNetworkPlan subnets: network, usable range, broadcast, and mask.Open
Survey Data CleanerResearchClean exports from common survey tools.Open
SVG ViewerWeb & SEORender and inspect SVG markup with a checkerboard preview.Open
System of Linear EquationsCalculatorsSolve linear systems with RREF, Gauss-Jacobi, and Gauss-Seidel methods using full step-by-step tables.Open
Table Relationship VisualizerSQL & DBVisualize FK relationships across a schema.Open
Text CompareDeveloperLine-by-line diff between two text blocks.Open
Text to PDFPDFConvert plain text into a clean, paginated A4 PDF.Open
Thesis Data AnalyzerResearchSummary, charts, and tests for thesis data.Open
Time Series VisualizerVisualizationPlot one or more numeric columns over a date column.Open
Time Zone ConverterDate & TimeConvert a time across world time zones instantly.Open
Timestamp ConverterTransformationConvert Unix timestamps and human dates.Open
Timestamp Log VisualizerLogsPlot log volume over time with a brushable timeline.Open
TOML ValidatorFormatsLightweight TOML syntax check with line-level error hints.Open
Tree View FormatterFormattingBrowse JSON/XML as a collapsible tree.Open
TreeMap GeneratorVisualizationBuild a treemap from a hierarchical categorical column.Open
Trend DetectionAnalysisSurface monotonic trends, level-shifts, and seasonality in time series.Open
Trim WhitespaceCleaningTrim leading/trailing whitespace in every field.Open
TSV → CSVTransformationSwitch tab-separated to comma-separated.Open
Twitter Card GeneratorWeb & SEOGenerate Twitter Card meta tags for social previews.Open
TypeScript InterfaceTransformationGenerate TS interfaces from JSON.Open
ULID GeneratorGeneratorsGenerate sortable, timestamp-prefixed ULID identifiers.Open
Unicode LookupDeveloperInspect each character's code point, HTML entity, and UTF-8 bytes.Open
Unique Value CountAnalysisCount distinct values per column.Open
Unit ConverterCalculatorsConvert length, weight, temperature, and volume units.Open
Universal Data LabWorkspaceDrop in any CSV/JSON/Excel/XML — auto-detect, profile, clean, visualize, export.Open
Unix Timestamp ConverterDate & TimeConvert Unix timestamps (s/ms) to and from human dates.Open
Unlock PDFPDFRemove a known password and save an unlocked copy.Open
URL Encoder / DecoderDeveloperPercent-encode or decode URLs and query strings — UTF-8 safe.Open
URL ExtractorExtractionExtract all URLs from text or HTML.Open
URL ValidatorValidationBulk URL syntax checker.Open
User-Agent ParserDeveloperParse a User-Agent string into browser, OS, and device.Open
UUID GeneratorDeveloperGenerate RFC 4122 v4 UUIDs in bulk.Open
UUID ValidatorDeveloperValidate and inspect UUIDs — version and variant.Open
VAT CalculatorCalculatorsAdd or remove VAT — inclusive and exclusive.Open
Visual SQL BuilderSQL & DBBuild SELECT/JOIN/WHERE/GROUP queries with a form.Open
Watermark PDFPDFStamp diagonal text watermarks across every page of a PDF.Open
Week Number CalculatorDate & TimeGet the ISO 8601 week number for any date.Open
Word CounterDeveloperLive counts of words, characters, sentences, and reading time.Open
XML → JSONTransformationConvert XML documents to JSON.Open
XML BeautifierFormattingPretty-print XML with proper indentation.Open
XML ValidatorValidationCheck XML well-formedness.Open
XPath TesterFormatsEvaluate XPath expressions against XML in your browser.Open
YAML BeautifierFormattingTidy YAML structure and indentation.Open
YAML ValidatorValidationCatch YAML syntax errors.Open
Z-Score CalculatorAnalysisPer-row z-scores for any numeric column with outlier highlights.Open