Free utility · No signup · 0 credits
JSON Formatter and Validator
Validate and pretty-print JSON.
Processed in your browser. Your input and files are not uploaded.
Process and download the complete result without signing up. No credit charge.
How to use JSON Formatter and Validator
Parse JSON and display an indented result. Invalid JSON produces an error without altering the input.
- Add your input to the tool above. No account is required.
- Add the supported input and choose your options.
- Process, review and download the full result. Account creation is optional.
What you can use
- JSON text
Text input is limited to 500,000 characters. The checksum tool also accepts one file up to 40 MB. Each tool validates its own input and reports unsupported values.
Use without signup. Save when you choose.
Processing on this page runs in your browser, whether or not you have an account. Your inputs and results stay on your device and are not uploaded. Nothing on this page creates History or Saved Work. In the separate workspace, when signed in with account saving enabled, your inputs, options, files and results are saved to your account for 30 days and are available in History and to authorised administrators. Anonymous guest records contain only the utility, run time and completion status, kept for up to 12 months. Account usage metadata is normally kept for 12 months. Local utility content is not sent to an AI provider. Download important work to keep it longer.
This is a deterministic utility, not an AI model. It is free without an account and on every plan. An internet connection is required to authorise each run. Usage requests still occur; see our privacy notice for those services.
Common questions
Is JSON Formatter and Validator free without an account?
Yes. Processing, copying and downloading on this page require no signup, subscription or credits. Signed-in visitors also pay zero credits. Use of Ali Pro remains subject to our Terms of Service.
Where does my input go?
Your input stays in this browser. Only the tool identifier and completion status go to Ali Pro for availability and abuse controls. Optional aggregate measurement records actions only with consent, never your content.