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PDFonDevicePDFonDevice
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Most features free · Secure · Runs in your browser

Handle PDFssafely and securely, on your own device

Merge, split (by page, range, or cut marks), reorder & remove pages, rotate, compress (light touch-up or JPEG raster pipeline), page adjust (crop, deskew, raster/vector output…), fill AcroForms + add-on text, markup & notes, text or image watermark, redact-by-box, search multiple PDFs at once, extract .txt (no OCR), PDF ⇄ image ZIP, encrypt / decrypt with passwords (JavaScript libraries in the browser). After the page loads, tools run mainly on your machine and can work offline once helper files or fonts are cached.

Start for freeSee features
No installationPDF content is not uploaded for editingCan work offline from the file upload step onward

PDF tools in the app

The same PDF items as the logged-in menu — in the same order as inside the app.

Merge PDFs

Arrange files and download one combined PDF. JavaScript libraries runs locally — file content is not uploaded for server-side processing.

  • Multiple files at once
  • Custom sort order
  • Subject to plan limits
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Split PDF

Split by individual pages, ranges, or cut markers when you only need part of a document.

  • Flexible split modes
  • Preserves page quality
  • Runs locally
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Reorder & delete pages

Reorder or drop unwanted pages — handy for decks and mis-ordered scans.

  • Simple ordering controls
  • Quick page removal
  • Download the edited PDF
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Rotate pages

Fix upside-down scans. Pick pages and rotate by ±90° / 180° / 270°.

  • Per-page selection
  • Flexible angles
  • JavaScript libraries on your device
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Compress PDF

Light lite mode or a JPEG raster pipeline for heavier size reduction — still in-browser.

  • Two compression paths
  • JavaScript libraries
  • Plan quotas apply
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Page adjust (crop / skew)

Pick pages, crop, deskew automatically or manually, export vector or raster — local pipeline.

  • Crop & straighten
  • Deskew scans
  • Two export modes
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Fill forms & add text

Fill AcroForm fields (text, checkbox, radio, dropdown…) and place text boxes; preview with JavaScript libraries; choose flatten or not when exporting.

  • Forms + add-text modes
  • In-tab preview
  • No OCR built in
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Markup & notes

Highlight, underline, sticky notes, pen, rectangles — export with JavaScript libraries.

  • Several markup kinds
  • Review before sending
  • Local export
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Sign & stamp

Draw or upload signature/stamp images, place many copies, drag into place. Visual marks only — not PKI.

  • Many placements
  • Resize & rotate
  • Requires Pro by default
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Watermark

Diagonal faded text or a PNG/JPEG logo with opacity/size — drawn with JavaScript libraries plus a Unicode font when using text.

  • Unicode text or image
  • Image watermark: Pro gate by default
  • Text watermark: free gate by default
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Redact sensitive areas

Draw blackout boxes on the preview. Export flattened PNG or PDF with black overlays — there is no automated text/pattern redaction like some desktop suites.

  • Manual box redaction
  • PNG path is stronger for burned pixels
  • Requires Pro by default
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Search multiple PDFs

Pick several files and search embedded text — no OCR; results grouped by file.

  • Many files in one run
  • Match snippets with context
  • Requires Pro by default
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Extract PDF text

Export `.txt` from the text layer (JavaScript libraries). Image-only scans stay empty — no in-app OCR.

  • Plain text output
  • Best on text PDFs
  • No OCR
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Images ↔ PDF

ZIP of page images from a PDF or merge JPG/PNG into an A4 PDF (margins, contain/cover/fill-width).

  • ZIP or single PDF
  • Tune DPI / JPEG
  • Rendered locally
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Password protect / unlock

AES-256 with user/owner passwords and flags, or decrypt with the open password (JavaScript libraries).

  • Encryption checked in-tab
  • No PDF upload for processing
  • Requires Pro by default
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Pricing

The app is free and does not impose usage limits on well over 90% of typical PDF features (merge/split/reorder, rotate, light compress, crop pages, fill forms, highlight, text watermark, extract text, export images…). The only paid plan is Pro — a fair yearly price — for the advanced features below:

Feature (requires Pro by default)Plan
Pro — 270,000 VND / year
Encrypt / decrypt PDF — user & owner passwords and print/copy/edit flags (JavaScript libraries in-browser)Pro
Hand signature & raster stamp images (visual only, not PKI digital signing)Pro
Image watermark PNG/JPEG (text watermark on the same screen stays on the free gate by default)Pro
Redact / blackout — draw boxes, export flattened PNG or overlaid PDFPro
Search many PDF files in one go (embedded text only; no OCR)Pro

How it works in 3 steps

Pick files → run the tool in the browser tab → download results. PDF bytes are not uploaded to the server for editing.

Step 01

Choose PDF files

One or many — tools open right in the browser.

Step 02

Process locally

Processing runs in the browser tab using JavaScript libraries — document bytes are not uploaded to be edited remotely.

Step 03

Download results

Edited PDFs, image ZIPs, redacted PNGs, or .txt — saved on your machine.

Data safety

Security comes first

PDFonDevice is built around running 100% of PDF processing on your device (local in the browser). That design helps protect sensitive files: document content is not sent to our servers to be edited. Servers only handle accounts, plans, payments, and quotas — transparent when you log in.

  • Every PDF tool listed here runs in your browser; output files are produced locally — we do not archive your PDF content on the app server.
  • The server handles sign-in, subscription, payments, and usage counters only. That is operational metadata, not a copy of your documents.
  • The first time you use some tools you may download small helper files or font assets. After they are cached you can work without uploading PDFs for processing.

How can you verify this yourself?

Turn off internet before you select or open a PDF, stay offline while you run the tool, and only go back online after you have downloaded the result (once the helper files or fonts for that tool were already cached). If it is the very first run and assets are not cached yet, connect once to fetch them, then repeat the offline check.

Local processing in the browser

Merge, split, reorder, rotate, compress, page adjust, forms + text, markup, watermark, redact, multi-file search, extract text, images↔PDF, password… run with JavaScript libraries on your machine depending on the tool — no server-side PDF editing.

Backend: account & quotas

Sign-in records your account, plan (Free/Pro…), and per-tool usage. Payments and auth stay separate from document bytes.

Protect data before you share

Use redaction or flattened PNG when you need a stronger blackout; always review outputs before sending them out.

Contact

Company details and official channels.

Ready to start?

Free registration. Start working with PDFs in the browser today.

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