ToolKuai – Privacy-first, 100% client-side media tools
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…
ToolKuai – Privacy-first, 100% client-side media tools launched on January 31, 2026 with 8 votes, #1,339 of 14,584 launches that month and more than 75% of that year's launches.
What it does
Stop uploading private files to random servers! 👋 I'm Linn, and I built ToolKuai to bring privacy back to your workflow. It’s a suite of high-performance tools (Video, Image, PDF, OCR) that run 100% locally in your browser using WebGPU & WASM. Your data never leaves your device! Fast, free, and no account needed. Give it a spin and let me know your thoughts! ❤️
Process videos, images, and PDFs directly in your browser. 100% private, no file uploads, lightning-fast local processing.
Process your files locally with ToolKuai . Since everything happens in your browser, your data never touches our server—keeping it 100% private, secure, and fast. Extract audio from video files in bulk. 100% private local processing in your browser. Free Bulk OCR. 100% private text extraction directly in your browser. No files ever leave your device. Free Bulk AI Background Remover. 100% private browser processing with no server uploads. Convert multiple Word docs to PDF at once. 100% private, no uploads, no limits. Convert EPUB ebooks to PDF safely. 100% private local processing with no server uploads. Free online image compressor to reduce JPG, PNG, and WebP file sizes in seconds. Free…from toolkuai.com
In the maker’s words, at launch
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…
Does a similar job
all alternatives →
I made a privacy-friendly and free image, audio and video converter2024 · fileconverter.tommyjepsen.com · ▲52Convert images and videos free, online and privacy-friendly with no ads, no tracking, and no cookies.
Offline File ConverterJul 2026 · offlinefileconverter.com · ▲8Convert files in your browser, nothing is uploaded, ever.
- IBI built image converters site that run in the browser2024 · dynapik.com · ▲19
Hello HN, I've used a lot of image converter websites to run for my daily jobs, but they required uploading my assets on their servers which I didn't like. I decided to build it myself and publish as a website for everyone to use at no cost (since the conversion happened on your browsers) I'd live to hear your thoughts about it. Cheers,
More work this month
the category →
Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.
Work · 25d ago · loficities.com
Smooth Recorder▲257Mac screen recordings that look edited when you hit stop
Work · 19d ago · smoothrecorder.com
Work · 13d ago · readrare.com
Source: Show HN post ↗ · launch text quoted in part
Launched alongside, January 2026
the whole month →- IN
Hey HN! I wanted to share something I built over the last few weeks: isometric.nyc is a massive isometric pixel art map of NYC, built with nano banana and coding agents. I didn't write a single line of code. Of course no-code doesn't mean no-engineering. This project took a lot more manual labor than I'd hoped! I wrote a deep dive on the workflow and some thoughts about the future of AI coding and creativity: http://cannoneyed.com/projects/isometric-nyc
AI · Jan 2026 · cannoneyed.com
Automatic AI-powered code reviews the moment you open a PR
Dev tools · Jan 2026 · kilo.ai
