DevTools Suite

In plain words

DevTools Suite is a collection of free developer tools that run entirely in the browser without requiring login, file uploads, or data tracking. It includes utilities for formatting and validating JSON, decoding JWT tokens, testing regular expressions, generating cron expressions, comparing text differences, and converting between formats like Base64, YAML, and SQL. All processing happens locally on the user's device, making it suitable for developers who prioritize privacy while working with common development tasks.

written from the facts on this page · October 2026

From the sources

Free privacy-first developer tools that run entirely in your browser. JSON formatter & validator, JWT decoder, regex tester, cron expression generator, diff checker, and smart checklist. No login, no uploads, no tracking.

Free privacy-first developer tools that run entirely in your browser. JSON formatter, JWT decoder, regex tester, UUID generator, Base64 encoder, URL encoder, SQL formatter, color converter, hash generator, YAML converter, and more. No login, no uploads, no tracking.

Privacy-first tools that run 100% locally. No login, no uploads, no tracking. Just open and use. Organize tasks, workflows, and nested checklists with a fast, privacy-first checklist system. Prettify, minify, validate and explore JSON with syntax highlighting. Build cron expressions visually. Supports Unix, AWS EventBridge and Spring. Compare text side-by-side with line, character and JSON-aware diffing. Decode JWT tokens and inspect claims without sending tokens anywhere. Test regular expressions live with match highlighting and replace preview. Encode text to Base64 or decode Base64 strings back to plain text instantly. Generate cryptographically random UUID v4 values. Copy one or all at…from devtoolssuite.dev

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  DevTools2025 · onlinewebdevtools.com · ▲18

  Collection of free online tools to help in web development

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  SafeDevTools SuiteAug 2026 · safedevtools.com · ▲1

  Privacy-first developer tools that run in your browser

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  DevTools – 50+ developer tools AIOMar 2026 · quan1229.com · ▲2

  JSON, Regex, JWT, Markdown and more — all in one toolbox

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  DvTools Nov 2025 · dvtools.in · ▲7

  One tab for All the dev tools

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  DevTools Jun 2026 · jsonviewer.live · ▲3

  9 free dev tools in one tab — JSON, JWT, Regex & more

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  DevToolboxFeb 2026 · devtoolbox.yashnandvana.in · ▲7

  150+ Free Developer Tools in One Place

Questions this answers

• safedevtools

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  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

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  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

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  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

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  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com