JavaScript Dev Tools is a developer tools tool listed on CodeTrendy, available at jstools.space. Built with Astro. Added in 2026. Privacy-first developer tools that run in your browser.
JSTools.Space is a free, privacy-first platform containing focused utilities for common development tasks. It helps developers format and validate JSON, HTML, CSS, XML, and Markdown; encode Base64 and URLs; inspect JWTs; generate passwords, API keys, UUIDs, hashes, salts, nonces, TOTP secrets, and other authentication values; compare text; query structured data; and prototype HTML, CSS, and...
- Category
- Developer Tools
- Domain
- jstools.space
- Added
- Tech
- Astro
- Domain Rating
- DR 32
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About JavaScript Dev Tools
JSTools.Space is a free, privacy-first platform containing focused utilities for common development tasks. It helps developers format and validate JSON, HTML, CSS, XML, and Markdown; encode Base64 and URLs; inspect JWTs; generate passwords, API keys, UUIDs, hashes, salts, nonces, TOTP secrets, and other authentication values; compare text; query structured data; and prototype HTML, CSS, and JavaScript.
Most processing happens directly inside the browser, so users do not need to upload code, credentials, tokens, or test data to an application server. No account or project setup is required.
The platform also includes a configurable Dummy Data Library, practical documentation, a developer security blog, the JSTools JSON Inspector Chrome extension, and the cross-platform JSON Studio desktop application.
Reviews
Reviews
Sam Chen
3mo ago
Really enjoying JavaScript Dev Tools
Free Online Developer Tools Hub | JSTools.Space: Privacy-first developer utilities for formatting JSON, encoding Base64, generating secure tokens, com. I've been using this for a bit and really appreciate how well it's put together. The interface is clean and it does exactly what it promises. Nice work by the team.
Hannah Brooks
18d ago
I had to debug why our attribution events weren't showing up right in the dashboard, and the dev team sent me a raw webhook payload that was one giant unreadable line. Dropped it into the JSON formatter, instantly saw the utm_campaign field was nested two levels deeper than our analytics mapping expected, and sent a screenshot back with the exact path circled. Also liked that it runs in the browser without uploading anything, since the payload had customer emails in it and I didn't want to think twice about that. Only small gripe is I kept hunting for a collapse-all button on the formatted tree so I could skim the top-level keys first.
