ConvertGeine
Free PDF, image & everyday online tools
What it does
Hi everyone! 👋 I built ConvertGeine because I wanted a simple place where people can edit PDFs, convert images and use everyday online tools without creating an account. The project currently includes PDF tools, image converters, QR and barcode generators, ZIP extraction and practical calculators. I'm adding new tools every week based on user feedback. I'd really appreciate your thoughts: • Which tool do you use the most? • What feature should I build next? Thanks for checking it out!
Does the same job
all alternatives →- PTPNG to PDF Conversion in the Browser2022 · png.to-pdf.net · ▲77
Hi everyone, I build some "online" converters as a side project in the last weeks. The difference to existing conversion websites is, that my converters don't upload your files. Everything happens in your browser on your device (with the help of a lot of great Open Source Javascript libraries). I think privacy is an essential feature for a service like this, so my converters also don't use google analytics or any other form of tracking (in fact they use no external resources at all). I started this because I ended up with some .heic files from my iPhone and had to use ImageMagick every time…
- TPToolKuai – Privacy-first, 100% client-side media toolsJan 2026 · toolkuai.com · ▲8
Hi HN, I’m Linn, the creator of ToolKuai (https://toolkuai.com). Like many of you, I’ve always been wary of "free" online file converters. Most of them are black boxes: you upload your private documents or images to a remote server, and you have no idea where that data ends up or how it’s being used to train models. I wanted to build a suite of tools (Video/Image compressor, OCR, AI Background Remover) that runs entirely in the browser. No files ever leave your machine. The Tech Stack To make this performant enough to rival server-side processing, I leaned heavily into modern…
- AFA free, browser-only PDF tools collection built with Kimi k2.5Feb 2026 · pdfuck.com · ▲5
Hi HN, I built a collection of 40+ PDF tools using Kimi k2.5 (with about $50 worth of credits) and a lot of “vibe coding”. The site: https://pdfuck.com (almost forgot I owned this domain ) What it does: 40+ PDF-related tools Completely free No downloads, everything runs in the browser All processing is done locally in your browser for better privacy It’s deployed on Cloudflare, so the running cost is basically close to zero. This started as a small experiment and slowly grew into a fairly complete PDF toolbox. I’d really appreciate feedback on performance, UX, and what tools you…
More dev tools this month
the category →
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Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
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
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