Smart Schema Detection Analyzer Online

Input formatdetected: csv

Output

Nullability

Input dataCSV317bytes·5rows·6cols

JSON SchemaJSON1,401bytes

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "array",
  "items": {
    "type": "object",
    "properties": {
      "id": {
        "type": "integer",
        "minimum": 1,
        "maximum": 5,
        "examples": [
          "1",
          "2",
          "3"
        ]
      },
      "name": {
        "type": "string",
        "minLength": 11,
        "maxLength": 17,
        "examples": [
          "Ada Lovelace",
          "Grace Hopper",
          "Katherine Johnson"
        ]
      },
      "email": {
        "type": "string",
        "format": "email",
        "minLength": 15,
        "maxLength": 21,
        "examples": [
          "ada@example.com",
          "grace@example.com",
          "katherine@example.com"
        ]
      },
      "signup_date": {
        "type": "string",
        "format": "date",
        "examples": [
          "2024-01-12",
          "2024-02-05",
          "2023-12-30"
        ]
      },
      "score": {
        "type": "number",
        "minimum": 9.3,
        "maximum": 9.8,
        "examples": [
          "9.7",
          "9.4",
          "9.8"
        ]
      },
      "is_active": {
        "type": "boolean",
        "examples": [
          "true",
          "false"
        ]
      }
    },
    "required": [
      "id",
      "name",
      "email",
      "signup_date",
      "score",
      "is_active"
    ]
  }
}

column	type	conf.	rows	nulls	uniques	samples
id	integer	100%	5	0 · 0%	5	1 · 2 · 3
name	string	100%	5	0 · 0%	5	Ada Lovelace · Grace Hopper · Katherine Johnson
email	email	100%	5	0 · 0%	5	ada@example.com · grace@example.com · katherine@example.com
signup_date	date	100%	5	0 · 0%	5	2024-01-12 · 2024-02-05 · 2023-12-30
score	float	100%	5	0 · 0%	5	9.7 · 9.4 · 9.8
is_active	boolean	100%	5	0 · 0%	2	true · false

Tip: use samples, upload, copy, download, and send-to actions inside the workspace where available.

What is Smart Schema Detection?

Smart Schema Detection Analyzer is a free, browser-based tool that helps you understand a dataset at a glance. Detect schema and types from any sample. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

How to use Smart Schema Detection

1Paste your data or drop a file (CSV or JSON).
2Read the generated summary — types, counts, distributions, and any issues found.
3Export the report, or send the data to another tool to act on the findings.

Features

Per-column types, nulls, uniques, and stats
Spot data-quality issues fast
100% client-side — no upload, fully private
Free with no account, no watermark, and no daily limit
Works on large inputs, limited only by your device's memory
Load a sample, then copy, download, or share your result

Common uses

Quick one-off analyzer jobs without opening a heavy app
Preparing data before importing it elsewhere
Sharing a reproducible result with a teammate via a link

Frequently asked questions

How do I use Smart Schema Detection?: Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Detect schema and types from any sample.
Is my data uploaded or stored anywhere?: No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.
Is Smart Schema Detection Analyzer free?: Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.
What's the maximum file size?: There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.
Do I need to install anything?: No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.

column

type

conf.

rows

nulls

uniques

samples

integer

100%

0 · 0%

1 · 2 · 3

name

string

100%

0 · 0%

Ada Lovelace · Grace Hopper · Katherine Johnson

100%

0 · 0%

ada@example.com · grace@example.com · katherine@example.com

signup_date

date

100%

0 · 0%

2024-01-12 · 2024-02-05 · 2023-12-30

score

float

100%

0 · 0%

9.7 · 9.4 · 9.8

is_active

boolean

100%

0 · 0%

true · false

What is Smart Schema Detection?

Frequently asked questions

How do I use Smart Schema Detection?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Detect schema and types from any sample.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is Smart Schema Detection Analyzer free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.