A JSONLint Alternative: JSON Wallet
Everything JSONLint does for validating and formatting JSON — plus tree view, repair, diff and more, all in your browser.
JSONLint is one of the best-known JSON tools on the web, and for good reason: it does one thing — validate and pretty-print JSON — with a clean, no-nonsense interface. If that is all you need, it is excellent. But many developers eventually want more than validation: a way to explore large payloads visually, fix broken JSON automatically, compare two documents, or convert JSON to another format. That is where JSON Wallet comes in as a fuller alternative that keeps the same "paste and go, nothing uploaded" simplicity.
What both tools do well
Both JSONLint and JSON Wallet validate JSON against the standard grammar, tell you where an error is, and pretty-print or minify a document. Both are free and neither requires an account to use the core formatter. If you just need to check whether a snippet is valid and tidy it up, either tool will do the job in seconds.
Where JSON Wallet goes further
JSON Wallet is built as a whole workspace rather than a single-purpose validator. The differences show up as soon as your JSON gets larger or messier:
| Capability | JSON Wallet | JSONLint |
|---|---|---|
| Validate JSON with line/column errors | ✓ | ✓ |
| Format (beautify) and minify | ✓ | ✓ |
| Interactive tree view | ✓ | — |
| Table view for arrays of records | ✓ | — |
| One-click repair of broken JSON | ✓ | — |
| Diff / compare two documents | ✓ | — |
| Multi-tab workspace | ✓ | — |
| Convert to CSV, YAML, XML, TypeScript, SQL | ✓ | — |
| JSONPath query tester | ✓ | — |
| Built-in HTTP API client | ✓ | — |
| Installable / works offline after first load | ✓ | — |
The tree and table views alone change how you work with a big API response: instead of scrolling through hundreds of formatted lines, you expand only the branch you care about, or scan an array of objects like a spreadsheet. And when the input is broken, the Repair tool fixes the most common mistakes — trailing commas, single quotes, missing quotes — in one click instead of hunting for them by hand.
Privacy: both keep it simple, JSON Wallet makes it a guarantee
A key reason people reach for a browser tool is that they are pasting in something sensitive — an API response with tokens, an internal config, customer data. JSON Wallet processes everything locally in your browser: formatting, validation, repair, diffing and conversion never send your JSON to a server. You can open your browser's Network tab and watch — formatting makes no request at all. Read more in our how it works page and privacy policy.
When JSONLint is the better choice
If you genuinely only ever need to validate and format, JSONLint's single-purpose focus is a virtue — there is nothing to learn and nothing extra on screen. Some people also simply prefer its minimal layout. JSON Wallet is the better fit when you want tree exploration, repair, diffing, format conversion, or an API client in the same place, without juggling several tabs and tools.
Want to try it on your own data? Open the editor and paste your JSON — it validates and formats instantly, entirely on your device.
Frequently asked questions
Is JSON Wallet free like JSONLint?
Yes. The JSON editor, formatter, validator, repair, diff and converters are free and need no account, just like JSONLint's formatter.
Does JSON Wallet upload my JSON to validate it?
No. Validation, formatting, repair, diffing and conversion all run in your browser. Your JSON is never sent to a server unless you explicitly use the optional Share feature.
Can JSON Wallet do everything JSONLint does?
Yes — it validates and pretty-prints JSON with precise error locations, and adds tree and table views, repair, diff, converters, a JSONPath tester and an API client on top.
Related comparisons
A CodeBeautify Alternative for JSON
CodeBeautify bundles hundreds of tools. If you want a focused, private JSON workspace without the clutter, JSON Wallet processes everything client-side.
Offline JSON Formatter That Works Without a Connection
JSON Wallet runs 100% client-side, so once the page has loaded it keeps formatting and validating JSON even with the network off. It is also installable as an app.
JSON Formatter Without Server Upload
Many online formatters POST your JSON to a server to process it. JSON Wallet does everything client-side, so sensitive data never leaves your machine.
See the full picture: browse every JSON Wallet tool →