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PDFSeal
Privacy-First, Zero-Upload PDF Toolkit in WebAssembly
PDFSeal is an open-source, client-side PDF toolkit powered by WebAssembly. Merge, compress (with exact 2MB/5MB target bisection), physically redact sensitive bytes, sign, watermark, and build automated multi-step pipelines. Everything runs 100% locally in your browser RAM with zero server uploads and zero tracking. 100% offline-ready PWA.
Hey Product Hunt community! 👋 I'm Muffin, creator of PDFSeal.
Ever needed to compress a PDF for a visa application, job portal, or tax filing, only to realize you just uploaded your private passport scan, financial statements, and home address to an unknown cloud server?
Most online PDF tools are cloud black boxes with arbitrary file limits, watermarks, and paywalls. We built **PDFSeal** with a strict zero-upload invariant:
🔒 **100% Client-Side**: Everything runs directly inside your device's browser memory (RAM) via WebAssembly & JavaScript. Zero bytes are uploaded to the cloud.
✈️ **True Offline & Airplane Mode**: Disconnect your Wi-Fi or turn on Airplane mode—it continues to run flawlessly as an installable PWA.
🎯 **Target-Size Bisection**: Need a document strictly under 2.0 MB for government portals? It mathematically converges to your target size without trial and error.
🛡️ **Physical Redaction**: Actually strips sensitive text and underlying vectors from document bytes rather than just slapping a black rectangle over them.
⚡ **Automated Pipelines**: Chain multiple steps (e.g. Redact → Compress → Watermark) into an automated one-click assembly line.
It's 100% open-source (AGPLv3), free, and has zero tracking.
I’d love to hear your thoughts, feedback, and feature requests. What’s your biggest PDF headache? 🦭
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About PDFSeal on Product Hunt
“Privacy-First, Zero-Upload PDF Toolkit in WebAssembly”
PDFSeal was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #160 on the daily leaderboard. PDFSeal is an open-source, client-side PDF toolkit powered by WebAssembly. Merge, compress (with exact 2MB/5MB target bisection), physically redact sensitive bytes, sign, watermark, and build automated multi-step pipelines. Everything runs 100% locally in your browser RAM with zero server uploads and zero tracking. 100% offline-ready PWA.
PDFSeal was featured in Productivity (661.9k followers), Open Source (68.9k followers), Privacy (11.4k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 220.6k products, making this a competitive space to launch in.
Who hunted PDFSeal?
PDFSeal was hunted by muffincodes27. 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.
Want to see how PDFSeal stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
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