Prism.Tools
A single web page with 40+ everyday developer utilities — JSON formatter, regex tester, base64 encoder, JWT decoder and more — that runs entirely in your browser with zero tracking and zero accounts.
🔗 Visit Prism.Tools
Description
Every developer keeps a mental list of little tools they reach for constantly: format this JSON, test this regex, decode this JWT, generate a QR code. Usually that means bouncing between a dozen different websites, several of which quietly log what you paste in. Prism.Tools bundles over 40 of these utilities into one privacy-focused page that processes everything client-side, in your own browser — nothing you type ever reaches a server.
The toolset covers the basics developers reach for daily (JSON formatter, regex tester, base64 encoder/decoder, Git command helper, HTTP status code reference, JWT decoder, password generator, hash tools) plus some extras (QR code generator, subnet calculator, CSS gradient maker, favicon creator). It's modular, has bookmarkable URLs per tool, keyboard shortcuts, and a dark mode. It relies on a handful of minimal CDN dependencies (marked.js, exifr, highlight.js, sql-formatter) rather than a full backend, and ships under a custom license that permits local or private-network hosting and modification but prohibits public re-hosting. The original Show HN post (January 2026) drew 380 upvotes and 104 comments — a solid, if not viral, reception.
💬 Our review
The short version: it's a genuinely useful, no-nonsense alternative to opening ten different single-purpose websites (JSONLint, Regex101, CyberChef-style tools) every time you need a quick utility — the whole point is that nothing you paste in ever leaves your browser.
Against browser DevTools or a scattered collection of bookmarked single-tool sites, the value here is consolidation and privacy, not any single tool being dramatically better than its dedicated competitor. It's a single-developer project (going by the GitHub organization the code lives under), so don't expect enterprise support or a roadmap — and worth flagging honestly: the original repository's GitHub Pages listing returned a 404 at the time of this review, while the actively maintained fork used here was live and functioning. For anyone who just wants a fast, private utility belt without ten browser tabs open, it's worth bookmarking; for a team that needs guaranteed uptime or commercial support, that single-maintainer status is the real risk to weigh.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit, licence personnalisée autorisant l'hébergement local/privé et la modification, mais interdisant la republication publique du site tel quel.
Pros
100% côté client, aucune donnée envoyée à un serveur
40+ outils regroupés en un seul endroit, URLs mémorisables
Gratuit, open source, mode sombre et raccourcis clavier
Cons
Dépôt d'origine (BLGardner) actuellement en 404 — projet porté par un fork actif (deepb1t)
Projet mono-développeur, pas de support ni feuille de route formelle
Dépend de quelques CDN externes (marked.js, exifr...) malgré l'argument de confidentialité