About fixjson.org

#What this site is for

fixjson.org is a workbench for the awkward data tasks that show up between “I have a payload” and “my application can use it.” You can repair almost-JSON copied from logs or an AI response, compare API results, inspect nested objects, convert between common formats, and decode transport-safe text without creating an account.

#What local-first means here

The editors and transformation code run in your browser tab. Repairing, validating, formatting, diffing, converting, encoding, and decoding do not require the site to send your pasted input to a fixjson.org application server.

That design reduces unnecessary data movement, but it is not permission to paste secrets everywhere. Remove API keys, access tokens, customer records, and production identifiers before using any web tool. The Privacy Policy explains the separate hosting and analytics data associated with visiting the site.

#Free and ad-supported

The tools are free. While the tool may have advertising around it, the editor and core actions do not require an account or paid plan.

#How the tools are built

The site is built using Next.js, React and TypeScript. The static HTML pages are generated for rapid delivery and a readable no-JavaScript content path, while each interactive tool is loaded as a focused client-side component. Rather than calling a conversion API, the JSON parser, the repair engine, the diff engine and the format converters all work in the browser.

The repair parser is more permissive than a strict JSON parser. It can help normalize common mistakes like single quotes, trailing commas, unquoted keys, comments, and Python-style literals. The validator takes the other side, rejecting those extensions and reporting where strict JSON stops parsing.

#What the site does not do

fixjson.org is not a document store, team workspace, schema registry, or production data pipeline. It does not provide saved projects, share links, version history, or cross-device synchronization. If an output matters, copy it into your repository, password manager, API client, or another system designed to retain it.

#Browser support

The tools are for recent versions of Chrome, Edge, Firefox and Safari on desktop and mobile. They use modern JavaScript, CSS, browser workers, and the clipboard API. The article text may be displayed on older browsers, but they may lack interactive features or copy controls.

#Feedback and issue reports

Send bug reports, corrections, and feature suggestions to contact@fixjson.org. A useful report includes the page URL, browser, expected result, actual result, and the smallest sanitized input that reproduces the problem.