OK Tools

Free browser tool

Free JSON Validator

Catch syntax errors fast with line and column hints — all processed locally.

Input

100% client-side. Your data never leaves this device.

About this json validator

JSON Validator helps you transform or inspect data right in your browser — no signup and no uploads.

Every conversion and check stays on your device, which is ideal for sensitive or one-off snippets.

When you need logged-in agent browsing and multi-step workflows, open okayok.ai.

Why use this tool

Private by design

Nothing is sent to our servers — processing stays local.

Line & column hints

When the engine reports a position, we map it to line/column and highlight it.

Clear errors

Readable messages so you can fix syntax quickly.

Related utilities

Jump to JSON formatter, YAML/XML/CSV converters, and Diff.

How to use

  1. 1

    Prepare input

    Paste text or upload a file from your device.

  2. 2

    Run the action

    Click convert/validate and tweak options like delimiter if needed.

  3. 3

    Copy or download

    Grab the result from the clipboard or save a file.

FAQ

More utility tools

JSON Formatter

Format, validate, and minify JSON in your browser.

JSON Tree View

Explore JSON as a collapsible, syntax-highlighted tree.

JSON Diff

Compare two JSON docs and highlight key-path changes.

Base64 Encode / Decode

Encode or decode Base64 text with UTF-8 in your browser.

More from Okay OK

Okay OK is the official home of the OK product family — OK Tools, OK Video, OK Images, and more.

Visit okayok.ai