Choose a tool
Open exactly the function you need right now.
100% local in your browser
PDF work,
that stays with you.
Merge, split, organize, fill, and sign — without uploads, without an account, and without leaving traces on third-party servers.
No uploads No account Open Source
Your filesnever leave the browser
5PDF tools
0File uploads
EN / DEBilingual
MITOpen Source
01 — TOOLSEverything your PDF needs.
Everything your PDF needs.
Nothing that gives it away.
Five focused tools instead of an overloaded suite. Pick a task and get started.
01 / BLATTWERKPDF
Merge
Drag your PDFs into the right order and combine them directly in the browser — without uploading anything.
Drag & Drop
02 — PRIVACYIt stays.
It stays.
Right. Here.
Blattwerk processes every document entirely on your device. No file, form value, or signature is ever transmitted.
01Browser, not serverProcessing runs entirely client-side.02Works offlineOnce loaded, the tools remain available.03No hidden analyticsNo tracking and no telemetry.
03 — THAT SIMPLEFrom document to result
From document to result
in three quiet steps.
Edit locally
Reorder, fill, or sign directly in your browser.
Save the result
Download the finished document back to your device.
04 — THE INTERFACEClear enough
Clear enough
to start immediately.
Dark or light, English or German: Blattwerk keeps the focus on the document — not on the interface.
- Live thumbnails for every page
- Drag and drop instead of long dialogs
- Correct rendering of rotated pages
01
Home / Dark mode
Local session05 — OPEN SOURCEBuilt in the open.
Built in the open.
Easy to verify.
Blattwerk is licensed under MIT. You can read the code, run it locally, modify it, or build it as a portable Windows app.
Ready for fewer detours?
Open Blattwerk and handle your next PDF exactly where it belongs: on your device.
Open Blattwerk now