About JSON Wallet
A fast, free, privacy-first JSON editor built for developers who work with JSON every day.
What JSON Wallet is
JSON Wallet is a free online tool for working with JSON (JavaScript Object Notation) data. It lets you format, validate, edit, compare, repair and transform JSON directly in your browser. The name comes from the multi-tab design: just like a wallet holds several cards, JSON Wallet holds several JSON documents side by side so you can switch between them without losing your place.
To be clear about a common point of confusion: JSON Wallet is not a cryptocurrency wallet, blockchain product, or any kind of financial application. It is purely a developer utility for editing and formatting structured text data.
Why we built it
Developers deal with JSON constantly — API responses, configuration files, log entries, database records, and more. Most of that JSON arrives minified, malformed, or deeply nested, and reading it raw is painful. Existing online formatters often paste your data to a remote server, bury the tool under ads and pop-ups, or force you to reload the page every time you want to work on a different document.
We wanted something different: a tool that is genuinely fast, respects your privacy, keeps multiple documents open at once, and does the jobs developers actually need — formatting, validating, diffing and repairing — without friction.
How it works
Everything in JSON Wallet runs entirely inside your web browser using JavaScript. When you paste or type JSON, it is parsed and rendered locally on your own device. Your data is never uploaded to a server, never logged, and never stored anywhere except in your browser's local storage, which keeps your open tabs available when you return. This makes the tool safe to use even with sensitive content such as API keys, access tokens, internal configuration, and private customer records.
What you can do with it
- Format & beautify — turn minified JSON into clean, indented, readable output.
- Minify — compress formatted JSON back into a single compact line.
- Validate — get live feedback on whether your JSON is valid, with the exact error location when it is not.
- Tree & table views — explore nested structures interactively instead of scrolling through raw text.
- Compare (diff) — see exactly what changed between two JSON documents.
- Repair — automatically fix common problems like trailing commas, missing quotes and unescaped characters.
- Escape, unescape, stringify & unstringify — transform JSON for embedding in strings, databases or other payloads.
- Multi-tab editing — keep up to a dozen documents open at the same time.
Free to use
JSON Wallet is completely free. There is no account to create, no subscription, and no feature locked behind a paywall. The site is supported by unobtrusive advertising, which lets us keep the tool free for everyone. If you would like to learn more about how we handle data and advertising, please read our Privacy Policy.
Learn more about JSON
We also publish free, in-depth guides about working with JSON. If you are new to the format or want to sharpen your skills, start with our guides section — it covers everything from JSON syntax basics to debugging malformed data.
Get in touch
Found a bug, have a feature request, or just want to say hello? Visit our contact page — we read every message.