PDFStax

What it does

PDFStax is a fast, browser-based PDF toolkit. Compress oversized files, merge multiple PDFs, split or extract pages, convert images to PDF (and back), and password-protect your documents — all free, with no account required for basic use. Every file is automatically deleted from our servers 30 minutes after processing, so your documents never sit around. Built for people who just need their PDF fixed and don't want to jump through hoops to do it.

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  PDF ToolkitJul 2026 · pdf-toolkit-9.ai.studio · ▲5

  Your files never leave your device. Free PDF tools

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  PuraPDF12d ago · purapdf.com · ▲2

  Merge, split, compress, convert, and edit PDFs free online

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  TopPdfHub27d ago · toppdfhub.com · ▲2

  25 free PDF tools. No signup. No paywalls.

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  PDFscalerJul 2026 · pdfscaler.com · ▲4

  Free PDF, image & utility tools that work instantly

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  PDF Tools KitJul 2026 · pdf-tools-kit.vercel.app · ▲3

  Free browser-based PDF tools.

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  PDFBone13d ago · pdfbone.com · ▲2

  Free online PDF tools – merge, split, compress & convert

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  Clipto MCP▲640

  Let agents source clips from terabytes of your local video

  Work · 18d ago · clipto.com

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  HyNote for Mac▲383

  Free local transcription that is 100% Private

  Work · 17d ago · hynote.ai

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  VoiceOS App Store▲330

  The app store for voice native apps that lives in your notch

  Work · 28d ago · voiceos.com

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  Scrimba Explain▲325

  Ask any question, get a video back instantly

  Work · 24d ago · scrimba.com

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  The New Calendly▲211

  Handle all of the work before, during, and after meetings

  Work · 17d ago · calendly.com

• TL
  The load-bearing vocabulary of Claude▲703

  Life & fun · 10d ago · louisabraham.github.io

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  Hey Noah▲641

  A proactive AI executive assistant for founders

  AI · Aug 2026 · heynoah.io

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  Clipto MCP▲640

  Let agents source clips from terabytes of your local video

  Work · 18d ago · clipto.com

• SA
  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▲608

  Claude for viral, high-converting social ads

  AI · Aug 2026 · adant.ai

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  I trained a 125M model to autocomplete piano on-device▲598

  I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

  AI · 17d ago · simedw.com