Dev tools · alternatives · 2026
24 alternatives to ConvertKing
Convert files in your browser. Zero uploads, 100% private.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
There are lots of solutions already, but most solutions have too many ads or they process on server(privacy concern). Webutils convert all images on client using webassembly.
2022 · webutils.app · its alternatives →
- 2
Convert files in your browser, nothing is uploaded, ever.
Jul 2026 · offlinefileconverter.com · its alternatives →
- 3
Fast, secure browser-based file conversion
Aug 2026 · filesconv.online · its alternatives →
- 4PT
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…
2022 · png.to-pdf.net · its alternatives →
- 5
Converto▲3Zero-upload private file converter in your browser
Jun 2026 · coverto.tech · its alternatives →
- 6
ConvertHub▲53Hi HN, I've built a lightweight file conversion API as a side project - Supports 100+ formats - REST API with PHP + JS SDKs - White-label frontend + backend available feedback welcome!
2025 · converthub.com · its alternatives →
- 7
- 8
100% Private local file converter. No uploads, no signups.
Feb 2026 · browserconvert.com · its alternatives →
- 9
Hey HN I built ImageConverter.dev because I got tired of “free” image converter sites that force uploads, or throttle conversions. So I made a tool that runs 100% client-side — meaning your images never leave your device. It’s built for speed, simplicity, and privacy. What it does Convert images between JPG, PNG, WebP Works offline once loaded (PWA support) How it works It uses the Canvas API and WebAssembly to handle conversions directly in the browser. There’s no upload, no tracking, no server costs, and it’s fast even on mid-range devices. Why I built it I wanted an instant, no-ads,…
Oct 2025 · imageconverter.dev · its alternatives →
- 10
Hey HN! I made How to Convert. Here's the problem I had and the solution I thought of: Problem When you search "How to convert PNG to ICO" on Google, you get a bunch of shady looking "free" results that send your data to unknown servers. The same is true for almost any conversion you are trying to do. So what do I want? I want something I can trust completely. AKA locally running, doesn't send my files or data anywhere and built by an independent developer building in public. Solution How to Convert Privacy-first: Files stay on your device and it works offline. Wide compatibility: Works with…
2025 · howtoconvert.co · its alternatives →
- 11
Free file converter that never uploads your files
Apr 2026 · convertifyhub.net · its alternatives →
- 12
Free file converter that runs 100% in your browser
Jun 2026 · convertizen.netlify.app · its alternatives →
- 13
Convert files locally. Zero uploads, maximum privacy.
Jul 2026 · convertafile.app · its alternatives →
- 14
- 15IB
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,
2024 · dynapik.com · its alternatives →
- 16
Free online file converter for documents, images,..
Dec 2025 · fileformer.com · its alternatives →
- 17
Convert Anything, Upload Nothing
Aug 2026 · filecontentconversion.app · its alternatives →
- 18
- 19
Convert files instantly in your browser - maximum privacy
2025 · ghost-converter.com · its alternatives →
- 20
Free online pdf, word & excel tools
Dec 2025 · pdfconverterpro2.com · its alternatives →
- 21
A local universal file converter that keeps files private
2025 · howtoconvert.co · its alternatives →
- 22
Hey HN I built ResizeImage.dev that runs 100% client-side — nothing gets uploaded, and it’s instant. What it does Resize, crop, and optimize images directly in your browser Supports JPG, PNG, WebP Works offline (PWA-ready) No tracking, no server, no data collection How it works It uses the Canvas API and WebAssembly codecs to process everything locally. All transformations happen in-memory, so no files ever leave your machine. Why I built it I needed a simple, no-BS way to resize images for web and social media — something fast, private. Try it https://resizeimage.dev Feedback…
2025 · resizeimage.dev · its alternatives →
- 23
Convert files 100% privately in browser. Nothing uploaded
Apr 2026 · convertsafe.app · its alternatives →
- 24
The free all-in-one converter that works offline
Jun 2026 · convertgo.app · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →