About JSON Wallet

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 side by side.
• Repair — automatically fix common problems like trailing commas, missing quotes and unescaped characters.
• Escape & unescape — add or remove backslash escaping so JSON can live safely inside strings, SQL or other payloads.
• Stringify & unstringify — convert JSON to a string literal and back, ideal for debugging API payloads.
• Base64 encode & decode — turn text or JSON into Base64 and back without leaving the editor.
• URL encode & decode — percent-encode values for query strings and API URLs, or decode them to read.
• Strip HTML & HTML preview — remove all HTML tags to keep just the text, or preview rendered HTML side by side.
• Size analyzer — break a document down property by property to see what is making a payload heavy.
• Open, fetch & save — load JSON from a file or a URL, and save your work back out to a file.
• Pinnable tool sidebar — pin the tools you use most to the top so they are always one click away.
• Multi-tab editing — keep as many documents open as you need 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.

How we research and test our guides

The JSON Wallet Editorial Team maintains the guides alongside the editor. Each article begins with the relevant specification or official runtime documentation—not another tutorial's summary. Those primary references are listed at the end of every guide so readers can verify a rule or follow a topic into greater depth.

JSON examples and parser errors are run through JSON Wallet before publication. Language examples are checked in the documented runtime, and tool-specific claims are compared with the current implementation. Each article carries a publication or revision date. If you find a result we cannot reproduce, send the smallest sanitized example to help@jsonwallet.com; corrections are treated as product bugs, not merely copy edits.

Project ownership and feedback

JSON Wallet is maintained by Bhushan Kumar Singh. Project documentation and the public issue tracker are available in the JSON Wallet GitHub repository. Bug reports should include a sanitized input, the expected result and the browser used so the behavior can be reproduced without exposing private JSON.

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.