Merge, split, compress, watermark, and batch-stamp PDFs — all processed locally in your browser. No upload. No account. No AI training.
Files are read and processed in your browser memory only. Nothing is ever transmitted to a server.
No sign-up, no tracking, no data trail. Close the tab and everything is gone.
Your documents are never used to train AI models. Nothing to train on — they never reach us.
Every tool runs 100% locally. Verify it yourself: load the page, disconnect Wi-Fi, and process a file — it still works.
Combine multiple files, normal or interleaved
Extract pages or split into separate files
Export pages as high-quality PNG/JPG
Combine multiple images into one PDF
Shrink file size while keeping readability
Alternate pages of two PDFs (front/back)
Remove password protection
Batch rotate 90°, 180°, 270°
Remove unwanted pages
Drag to reorganize document structure
Flip the entire document instantly
Add numbers, many positions & styles
Text or image watermark, batch applied
Split scanned two-page spreads
Split by chapter bookmarks automatically
Nothing like it elsewhere: multi-page stamping, batch sealing, cross-page seals and an online seal generator — all local, all offline-capable.
Stamp every page of a document in one pass, with custom position & size.
Stamp hundreds of files at once — up to thousands in a single run.
Auto-position seals across page seams to prevent page substitution.
Create official-style seals with transparent backgrounds — no design tools needed.
No subscriptions. No hidden fees. No "delete after 1 hour" fine print.
🔧 Replace YOUR_PAYPAL_MERCHANT_ID in the page source to activate PayPal checkout. Until then, email bytpdf@163.com for instant access.
Download the entire toolbox as one HTML file. No installation, no internet required — perfect for air-gapped environments, field work, and internal networks.
⬇ Download Offline Toolkit (EN)For legal, medical, HR and finance professionals handling sensitive documents.
Local processing means BytPDF is neither a data controller nor a processor. No DPA needed — there is no data transfer to sign away.
Unlike cloud tools that route files through US/other data centers, your document never leaves your device. International data transfer rules simply don't apply.
We collect zero document content, zero filenames, zero session logs. There is nothing to minimize because nothing is collected.
Open a tool, disconnect your Wi-Fi, process a file. If it works offline, it's truly local. That's the industry-standard test — and we pass it.
Yes. All processing runs inside your browser using PDF.js (Mozilla's open-source engine). The file is read from your disk into browser memory, processed, and the result is downloaded — nothing is transmitted. Disconnect Wi-Fi and test it yourself.
By design. Because no document data ever reaches our servers, BytPDF has no role as data controller or processor. For EU users handling PII, this avoids the cross-border transfer and DPA obligations that cloud-based PDF tools trigger.
One payment, lifetime access: multi-page stamping, batch sealing (up to thousands of files), cross-page seals, the online seal generator, and the downloadable single-file offline toolkit. No renewals, ever.
Never. Documents never reach our infrastructure, so there is nothing to train on. The answer is "no" by architecture, not by policy.
BytPDF produces image-based stamps for internal documents, contracts, invoices and certificates. For CA-certified legally binding signatures, use a regulated e-signature provider — BytPDF is the fast, private complement for day-to-day batch stamping.
Email bytpdf@163.com for instant access today. PayPal and Stripe checkout are being set up for automated purchase.