PDFcrest

What it does

I built PDFcrest because I was tired of PDF tools that make you upload a file just to merge two pages. Most tools here (merge, split, rotate, delete pages, crop, reorder, watermark removal) run in your browser — the file never leaves your machine. A few heavier jobs (PDF to Word, OCR, compression) do need a server, but everything else is client-side. Free, no account, no email wall. 20+ tools, adding more based on requests — love feedback if something breaks on a weird PDF.

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  PDFuck13d ago · pdfuck.com · ▲1

  40+ private PDF tools that run entirely in your browser

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  PDF Deckle13d ago · bunklyf.com · ▲3

  Every PDF tool you need

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  PDF WithMeAug 2026 · ▲1

  Private PDF tools that never upload your files

• PT
  PDF tools that run in the browser, no uploadJul 2026 · pdfcdf.com · ▲6
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  PDFlexa9d ago · pdflexa.com · ▲2

  Fast, private PDF tools that work in your browser

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  FreeTools30d ago · ▲2

  Merge, sign & compress files — nothing ever uploaded

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  Clipto MCP▲640

  Let agents source clips from terabytes of your local video

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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

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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 · 16d ago · simedw.com