About Jsump

Jsump was built out of frustration. Every time we needed to format a massive CloudWatch log payload or debug a deeply nested API response, we were forced to paste sensitive data into ad-ridden, server-side formatting websites.

The Privacy Problem

When you paste JSON into most online formatters, it is sent via POST request to a backend server to be parsed and returned. For production API keys, user PII, or proprietary schemas, this is a massive security risk.

The Jsump Philosophy

We believe developer tools should be fast, private, and local-first.

• Zero Server Roundtrips: All of our tools—Formatter, Diff, Path Finder—run entirely in your browser using JavaScript and WebAssembly.
• Static Architecture: This site is built as a static HTML export. There is no backend database to store your queries, because there is no backend.
• No Tracking: We don't use invasive analytics. The tool exists to solve a problem, not to harvest data.

Open Web Standards

Jsump relies heavily on the incredible work of the open-source community, particularly standard browser APIs, Alpine.js for reactivity, and jsondiffpatch for structural comparison. We encourage you to view our source code and verify the network tab for yourself.