SyncTonight

What it does

Free online developer tools — JSON formatter, image compressor, Base64/URL encoders, JWT decoder, UUID and password generators, and 50+ more. No signup required, everything runs in your browser. Also includes 50 troubleshooting guides for real errors developers hit (JSON parsing, Docker, AI-API rate limits), 20 language cheatsheets, and 13 tech comparisons. Built because free dev-tool sites shouldn't bury the actual tool under a signup wall.

Free online developer tools - JSON formatter, Base64/URL encoders, JWT decoder, UUID and password generators, and 40+ more. No signup required.

JSON formatting, encoding, security, generators, and converters - no signup required, nothing ever leaves your browser. Eight categories, one hundred plus tools - organized so you never have to guess where something lives. Format, validate, and minify JSON with syntax highlighting and error line numbers. Encode or decode text, files, and images to and from Base64 instantly. Decode and inspect JSON Web Tokens - header, payload, and signature, all client-side. Generate v1 and v4 UUIDs in bulk, ready to copy or export as JSON/CSV. Test regular expressions live against sample text with match highlighting. Generate MD5, SHA-1, and SHA-256 hashes from text or files in one click. Convert instantly…from synctonight.com

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  DevUtilsApr 2026 · tools.wasta-wocket.fr · ▲3

  25 free dev tools that run in your browser. No signup.

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  DevToolboxFeb 2026 · devtoolbox.yashnandvana.in · ▲7

  150+ Free Developer Tools in One Place

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  Tools20252025 · ▲8

  Free developer tools - JSON, passwords, encoding & more

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  ViteTools.devNov 2025 · ▲10

  Free online developer tools & utilities

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  Toolkit Hub2025 · toolkit-hub.gotodev.ma · ▲9

  Every tool a developer needs, all in one place

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  NicheUtils: 40+ Free Dev Tools 2025 · nicheutils.com · ▲9

  40+ dev tools that run 100% in your browser - no servers

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  /dev/null▲483

  a social network for devs

  Dev tools · 3d 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 · 23d ago · openbot.run

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  Talanoa▲345

  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 · 28d ago · corespeed.io

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  The load-bearing vocabulary of Claude▲710

  Life & fun · Aug 2026 · louisabraham.github.io

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  Hey Noah▲656

  A proactive AI executive assistant for founders

  AI · Aug 2026 · heynoah.io

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  Clipto MCP▲655

  Hey HN, We recently built Clipto. It’s a tool that lets you search over terabytes of video, audio, and images on your computer, without relying on the cloud. Motivation: we probably all had this similar experience, we know a moment exists in a video or audio, but finding it takes hours scrubbing the timeline. You can send all the media to process in the cloud, but it’s slow, expensive and raises privacy concerns. So we decided to build our own on-device media search engine. How it works (high level): 1. We ingest video, audio, image; normalize formats via ffmpeg; run content analysis to…

  Work · Aug 2026 · clipto.com

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  Simple algorithm and color space to generate diverse skin tones▲627

  Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…

  Life & fun · Aug 2026 · toneyalexander.github.io

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  AdAnt AI▲620

  Claude for viral, high-converting social ads

  AI · Aug 2026 · adant.ai

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  Astute▲606

  Automate your B2B brand going viral, with new media creators

  AI · Aug 2026 · company-app.joinastute.com