A JSON parser and validator with a CLI. Standalone version of jsonlint.com
jsonlint.com
Alternatives to
Prism.Tools
Best alternatives to Prism.Tools in 2026
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.
Quick comparison of Prism.Tools alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Développeurs | — | |
| 2 | Informatique | — | |
| 3 | Développeurs | — | |
| 4 | Équipes de développement et organisations d'ingénierie voulant automatiser et standardiser la revue de code à grande échelle. | — | |
| 5 | Développeurs qui tuent régulièrement des process bloqués sur des ports localhost pendant le dev | — | |
| 6 | Développeurs faisant tourner plusieurs agents de codage IA en parallèle | — | |
| 7 | Équipes dev avec des codebases larges/multi-langages voulant améliorer la précision des assistants IA au-delà de la recherche vectorielle | — | |
| 8 | Équipes utilisant déjà à la fois Claude Code et un abonnement Codex, voulant une seconde revue sans changer d'outil | — | |
| 9 | Développeurs utilisant des agents de code IA (Claude Code, Codex, Gemini) qui veulent une mémoire de projet versionnée et lisible | — | |
| 10 | Professionnels SIG, analystes géospatiaux, développeurs travaillant avec des données géographiques sur Mac | — | |
| 11 | Développeurs utilisant Claude Code, Cursor, Codex ou Zed qui veulent une mémoire persistante locale pour leur agent IA | — | |
| 12 | Chercheurs, académiques et développeurs utilisant LaTeX qui ont besoin de diagrammes techniques précis | — |
#1
#4
An open-source, Alibaba-built code review tool that reads your Git diffs and leaves precise, line-by-line comments — combining hard-coded security checks with an LLM for the judgment calls.
github.com
- ✓ Free, open source (Apache 2.0), and actively maintained
- ✓ Hybrid architecture gives consistent vulnerability coverage plus nuanced LLM feedback
#5
A free command-line tool that shows you exactly what's running on your computer's localhost ports and lets you kill it, replacing the usual mess of lsof, ss, and manually hunting for stuck processes. Not to be confused with the SonarQube code-quality prod
github.com
- ✓ Replaces manual lsof/ss/netstat commands with one readable command
- ✓ Shows Docker container names, Compose projects, and resource usage alongside process info
#6
A free terminal app that lets you run several AI coding agents at once and keep track of what each one is doing, instead of juggling a pile of separate terminal windows or tabs.
github.com
- ✓ Real-time visibility into the status and lifecycle of each running agent
- ✓ Session persistence — agents keep running after terminal detachment
#7
A free, open-source tool that turns an entire codebase — code, docs, database schemas, config files — into a map of how everything connects, so an AI coding assistant can find the right file instead of guessing.
github.com
- ✓ Local AST parsing via tree-sitter — no LLM required, deterministic graph construction
- ✓ Confidence-tagged edges (EXTRACTED vs INFERRED) for transparent provenance
#8
A free plugin from OpenAI that lets you call on Codex to review your code or hand off a background task without ever leaving Claude Code.
github.com
- ✓ Native integration into the Claude Code workflow, no app-switching required
- ✓ Steerable adversarial reviews that challenge design decisions, not just syntax
#9
A tool that keeps your project's history and past decisions written down as plain text files in your own code repository, so an AI coding assistant can read them instead of forgetting everything between sessions.
github.com
- ✓ Mémoire stockée en Markdown brut, reviewable et diffable comme du code
- ✓ Compatible multi-agents (Claude Code, Codex, Gemini)
#10
A tiny Mac app that lets you peek inside a map file by pressing the Space bar in Finder, instead of opening a full mapping program just to check what's in it.
tony.expert
- ✓ Prévisualisation instantanée dans le Finder sans logiciel SIG complet
- ✓ Supporte de nombreux formats géospatiaux
#11
A free tool that gives AI coding assistants like Claude Code or Cursor a real memory — so you stop re-explaining the same project decisions to them every session.
pmbai.dev
- ✓ 100% local, aucune donnée envoyée à un serveur
- ✓ Recall hybride performant (94.6% recall@10)
#12
A free, browser-based code editor for TikZ, the LaTeX language for drawing precise technical diagrams — no install, no LaTeX setup needed on your machine.
tikz.dev
- ✓ No local LaTeX installation needed to test TikZ diagrams
- ✓ Free, open-source, no account required
FAQ about Prism.Tools alternatives
- What is the best alternative to Prism.Tools in 2026?
- Based on our selection, jsonlint is the best alternative to Prism.Tools in 2026. A JSON parser and validator with a CLI. Standalone version of jsonlint.com. See our full ranking above to compare all options.
- Is Prism.Tools free?
- Prism.Tools is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Prism.Tools are there?
- mySelectas has listed 12 alternatives to Prism.Tools in the Editors, IDEs & Dev Tools category. Our selection is updated regularly to include the best options available.