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kmra.dev
154 free file tools that never upload your files
Compress a photo to the exact KB a form asks for, merge PDFs, trim a video, cut a ringtone, make a Wi-Fi QR code, copy text from a screenshot, format JSON, tune a guitar: 154 small tools in 10 free apps. Everything runs in your browser. Each page tells the browser it may only talk to its own site, so your files never leave your device. No sign-up, no watermark, works offline. Open source (AGPL), in English and Bangla.
Hi Product Hunt! I'm Rejowan, a software engineer, and kmra.dev started with a small annoyance: I kept uploading my passport scan to random websites just to make it smaller for a form, and each one wanted a sign-up, showed ten ads or added a watermark.
So I built the tools I needed, and kept going: 154 tools across 10 apps for images, PDFs, video, audio, QR codes, text in pictures, code, colours, calculations and music.
Everything runs in your browser. The heavy work happens in WebAssembly and Web Workers (WebCodecs with ffmpeg.wasm for video, an on-device model for background removal, Tesseract and PaddleOCR for text), and every page's security policy only allows requests to its own site, so a file can't leave your device even by accident. Free, no account, no watermark, works offline once loaded, and open source.
A few to try first:
- Compress a photo to an exact size (50 KB, 100 KB) for a form
- Remove a background, entirely on your device
- Merge or compress PDFs
- Print a Wi-Fi QR card for guests
I'd love feedback on two things: which tool you'd want next, and anything that feels slow or confusing on your phone.
About kmra.dev on Product Hunt
“154 free file tools that never upload your files”
kmra.dev was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #146 on the daily leaderboard. Compress a photo to the exact KB a form asks for, merge PDFs, trim a video, cut a ringtone, make a Wi-Fi QR code, copy text from a screenshot, format JSON, tune a guitar: 154 small tools in 10 free apps. Everything runs in your browser. Each page tells the browser it may only talk to its own site, so your files never leave your device. No sign-up, no watermark, works offline. Open source (AGPL), in English and Bangla.
On the analytics side, kmra.dev competes within Productivity, Open Source, Privacy and GitHub — topics that collectively have 786.8k followers on Product Hunt. The dashboard above tracks how kmra.dev performed against the three products that launched closest to it on the same day.
Who hunted kmra.dev?
kmra.dev was hunted by K M Rejowan Ahmmed. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of kmra.dev including community comment highlights and product details, visit the product overview.
K M Rejowan Ahmmed
Hi Product Hunt! I'm Rejowan, a software engineer, and kmra.dev started with a small annoyance: I kept uploading my passport scan to random websites just to make it smaller for a form, and each one wanted a sign-up, showed ten ads or added a watermark.
So I built the tools I needed, and kept going: 154 tools across 10 apps for images, PDFs, video, audio, QR codes, text in pictures, code, colours, calculations and music.
Everything runs in your browser. The heavy work happens in WebAssembly and Web Workers (WebCodecs with ffmpeg.wasm for video, an on-device model for background removal, Tesseract and PaddleOCR for text), and every page's security policy only allows requests to its own site, so a file can't leave your device even by accident. Free, no account, no watermark, works offline once loaded, and open source.
A few to try first:
- Compress a photo to an exact size (50 KB, 100 KB) for a form
- Remove a background, entirely on your device
- Merge or compress PDFs
- Print a Wi-Fi QR card for guests
I'd love feedback on two things: which tool you'd want next, and anything that feels slow or confusing on your phone.