194 tools

JSON Validator

Check JSON and pinpoint errors by line and column.

Code & JSON Tools

About the JSON Validator

The JSON Validator is a free online developer tool from Toolbench. Check JSON and pinpoint errors by line and column. Paste your text and the result updates instantly as you type or change the options.

Category
Code & JSON Tools
Price
Free
Account
Not required
Runs
Entirely in your browser

How to use the JSON Validator

  1. Paste or type your text into the input box.
  2. The output updates instantly — there are no settings to fiddle with.
  3. Copy the result, or click “use output” to chain another transformation.

Example

With the default settings, this input:

{"name": "Toolbench", "tools": 194,}

becomes:

✕ Invalid JSON

Expected double-quoted property name in JSON at position 35 (line 1 column 36)

Line 1, column 36:
{"name": "Toolbench", "tools": 194,}
                                   ^

Tips
• Remove trailing commas before } or ].

Privacy

Everything runs in your browser: what you type or paste is processed by JavaScript on your device, not on a server. If you are signed out, nothing is saved at all. If you sign in with Google, your inputs and settings are saved privately to your account so they sync across devices.

Frequently asked questions

Is the JSON Validator free?

Yes. JSON Validator is completely free with no sign-up, no usage limits and no watermarks.

Is my data private?

Yes. The JSON Validator processes everything in your browser. Signed out, nothing is saved; signed in, your inputs sync privately to your own account.

Does it work on my phone?

Yes. Toolbench runs in any modern browser on desktop, tablet or phone — there is nothing to install.

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