Sinsubir - Convert & edit files 100% in your browser
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Convert & edit files 100% in your browser
File tools that never upload your files
Private PDF & image tools — nothing leaves your device
API
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Maker
📌
Hey Product Hunt 👋
I built Sinsubir because I was tired of uploading my personal files — photos, contracts, IDs — to random websites just to convert or compress them. You never really know where those files end up.
So Sinsubir runs 100% in your browser. Your files never touch a server: no uploads, no accounts, no watermarks, no limits. Convert HEIC to JPG, compress images, merge/split/sign/watermark PDFs and more — all processed on your own device, and gone the moment you close the tab.
It's free and there's nothing to install. I'd love your feedback on which tool to add next!
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tried the pdf merge and it actually finished way faster than i expected, all without anything uploading. honestly the whole no-server thing is the main reason i'd come back to it.
The "no uploads" approach is exactly why we built Sinsubir. Your files never leave your device, so processing is not only faster but also keeps your privacy intact. We're happy to hear you noticed the difference.
More tools are coming soon, so stay tuned!
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honestly this looks great for people worried about privacy. one thing that would be awesome is batch processing for PDFs, like merging or compressing like 20 files at once instead of doing them one by one. would save a ton of time
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Maker
@nuriyetoplp0p0 Exactly—that was the motivation behind Sinsubir.
Most online tools require you to trust a server with sensitive files. We wanted a different approach: everything runs locally in your browser, so your photos, documents, and personal files stay on your device from start to finish.
Privacy shouldn't be a premium feature—it should be the default.
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Pretty slick that everything stays local, no waiting on uploads. Merged a few PDFs and it handled them instantly, no sketchy data stuff going on.
That's exactly the experience we wanted to create: fast, simple, and private. No waiting for uploads, no wondering where your files are stored—because they never leave your device. Thanks for giving Sinsubir a try, and we're excited to keep adding more tools!
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Finally a file converter that doesn't try to email me or shove me into a paywall after one use. Merge PDF worked instantly on a 50-page doc and nothing left my laptop, which is honestly the dream.
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Files never leave your device, that part actually works without me tinkering with anything. Resized a few images and merged a couple of PDFs, it handled bigger files than I expected.
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Ran it on a sensitive PDF to test the privacy angle and was pleasantly surprised everything happened locally. Compression was quick and the merged file came out clean with no quality loss.
Replies
tried the pdf merge and it actually finished way faster than i expected, all without anything uploading. honestly the whole no-server thing is the main reason i'd come back to it.
@durmusate3uo Thanks so much! That means a lot.
The "no uploads" approach is exactly why we built Sinsubir. Your files never leave your device, so processing is not only faster but also keeps your privacy intact. We're happy to hear you noticed the difference.
More tools are coming soon, so stay tuned!
honestly this looks great for people worried about privacy. one thing that would be awesome is batch processing for PDFs, like merging or compressing like 20 files at once instead of doing them one by one. would save a ton of time
@nuriyetoplp0p0 Exactly—that was the motivation behind Sinsubir.
Most online tools require you to trust a server with sensitive files. We wanted a different approach: everything runs locally in your browser, so your photos, documents, and personal files stay on your device from start to finish.
Privacy shouldn't be a premium feature—it should be the default.
Pretty slick that everything stays local, no waiting on uploads. Merged a few PDFs and it handled them instantly, no sketchy data stuff going on.
@havvat57401 Thank you, Havva!
That's exactly the experience we wanted to create: fast, simple, and private. No waiting for uploads, no wondering where your files are stored—because they never leave your device. Thanks for giving Sinsubir a try, and we're excited to keep adding more tools!
Finally a file converter that doesn't try to email me or shove me into a paywall after one use. Merge PDF worked instantly on a 50-page doc and nothing left my laptop, which is honestly the dream.
Files never leave your device, that part actually works without me tinkering with anything. Resized a few images and merged a couple of PDFs, it handled bigger files than I expected.
Ran it on a sensitive PDF to test the privacy angle and was pleasantly surprised everything happened locally. Compression was quick and the merged file came out clean with no quality loss.