In-browser PDF engine · no upload

Edit, protect and unlock PDFs — without uploading them

SlatePDF is a set of PDF tools that run inside your browser. Fix a typo on a form, lock a tax return with a password or remove one from a bank statement in under a minute. Free, no watermark, nothing to install.

Edit a PDF now Password protect a PDF

  • 0 Buploaded by free tools
  • AES-256password encryption
  • Nowatermark on exports

Pick a tool

Free

Edit a PDF

Add text, white out mistakes, highlight, draw, insert images and rearrange pages.

 Free

Password protect

Encrypt a PDF with AES-256 and an open password before you share it.

 Free

Remove a password

Enter the password once and save an unlocked copy that opens instantly.

 Free

Create a blank PDF

Plain, lined, grid or dot pages in Letter, Legal or A4 — printable to scale.

 Pro

Merge, split & compress

Combine files, pull out page ranges, shrink exports and convert images.

 Pro

Sign a PDF

Draw or type your signature and place it anywhere on the page.

Why your files stay on your device

Most online PDF sites upload your document to their servers, process it there and keep a copy for an hour or a day. That's a poor fit for the documents people actually need to fix in a hurry: tax forms, leases, medical paperwork, pay stubs. SlatePDF's free tools load two open-source libraries — Mozilla's pdf.js to display pages and pdf-lib to write them — and do all the work inside your browser tab. When you close the tab, the file is gone.

Only the Pro tools for merging, splitting, compressing and converting images send files to our server, because those jobs need more memory than many phones have. Even then, files are processed in memory and discarded immediately.

What people use SlatePDF for

  • Correcting forms — whiteout a wrong date or address on a PDF from a landlord, school or county office and type the right one in a matching font.
  • Protecting attachments — add AES-256 encryption before emailing a W-2, 1099 or signed contract.
  • Archiving statements — strip the password from bank and brokerage statements so tax software and backup tools can read them.
  • Assembling packets — reorder pages, delete blanks and insert a cover page before you submit a rental or loan application.
  • Printing practice paper — generate college-ruled, 1/4-inch grid or dot pages in US Letter.

Free vs. Pro

Editing, page tools, blank PDFs and exporting are free with no watermark. Protect and Unlock are free for 3 files a day, or 10 with a free account. SlatePDF Pro ($7.99/month) adds e-signatures, merge, split, compress, image conversion, unlimited protect/unlock and files up to 200 MB.

Who builds it

SlatePDF is built and maintained by Daniel Brooks, a product engineer in Austin, TX, who got tired of watching relatives upload their tax documents to random websites. Questions or a bug? Get in touch — every message is read by a person.