PDF Studio
The all-in-one PDF editor that runs entirely in your browser — merge, split, annotate, sign, compress, and more.
100% Private · No Upload · No SignupPDF Studio is a free, browser-based PDF editor. Upload any PDF to edit text, insert images, merge or split pages, annotate, add a signature, apply a watermark, compress, or password-protect — all without sending your file to any server.
Drop your PDF here
or click to browse — accepts .pdf files
What Is PDF Studio?
A fully private, browser-based PDF toolkit for everyday document needs.
PDF Studio is a free online PDF editor that runs entirely inside your web browser using industry-standard open-source libraries (pdf-lib and pdf.js). There is no server involved — your files never leave your device. Whether you need to merge two contracts, annotate a report, add a signature to a lease, compress a large slide deck before emailing, or protect sensitive documents with a password, PDF Studio handles it all in one place without any software to install or accounts to create.
How to Use This Tool
- 1
Choose a mode
Select Edit & Annotate, Merge, Compress, Image→PDF, or Security from the tabs at the top.
- 2
Upload your file(s)
Drag files into the upload zone, or click Browse. PDF files load instantly — thumbnails appear in the page panel.
- 3
Select a page
Click any thumbnail to jump to that page. Use the rotate, duplicate, delete, and extract buttons next to each thumbnail.
- 4
Use annotation tools
Pick a tool (text, draw, highlight, signature, shapes, watermark, etc.) and click or draw on the canvas to annotate.
- 5
Apply global options
Set headers/footers, page numbers, watermarks, or security settings that apply to all pages at once.
- 6
Download or print
Click Download Final PDF to save the edited file, or Print PDF to send it directly to your printer.
Advanced Features
Merge & Split
Combine unlimited PDFs or extract any page range into a new document.
Smart Compression
Four preset levels recompress images and strip metadata for up to 80% smaller files.
Digital Signature
Draw a signature on the canvas and place it precisely on any page with a single click.
Full Annotation Suite
Highlight, underline, freehand draw, shapes (rectangle, circle, arrow), and sticky notes.
Password Protection
Encrypt any PDF with AES-256. The password is applied locally — no server ever sees it.
Image Conversion
Turn any JPG, PNG, or WebP photo into a PDF page — great for scans and photo albums.
Direct Print
Send the finished PDF to your printer directly from the browser — no download needed.
Headers & Page Numbers
Add consistent headers, footers, and auto-incrementing page numbers across every page at once.
Online vs Desktop vs Mobile PDF Editors
| Feature | PDF Studio (Online) | Desktop App | Mobile App |
|---|---|---|---|
| Cost | ✓ Free | $49–$299/yr | Free + IAP |
| No install needed | ✓ Yes | ✗ No | ✗ No |
| File privacy (local only) | ✓ Always | ✓ Yes | Varies |
| Merge & split | ✓ | ✓ | Limited |
| OCR (scanned text) | Overlay only | ✓ Full OCR | Limited |
| Signature support | ✓ Draw | ✓ Draw+cert | ✓ Draw |
| Works offline | After load | ✓ Yes | ✓ Yes |
| Cross-platform | ✓ Any browser | OS specific | iOS/Android |
Recommended Settings by Use Case
| Use Case | Mode | Compression | Tips |
|---|---|---|---|
| Résumé / job application | Edit & Annotate | Recommended | Add header with your name; keep under 1 MB |
| Contracts & signatures | Edit → Signature | Low | Use password protection; keep images at full quality |
| Scanned documents | Edit → Text overlay | High | Add text boxes over blank fields; compress to reduce scan size |
| Large reports for email | Compress | High / Extreme | Target under 5 MB for most email clients |
| Photo album / portfolio | Image → PDF | Recommended | Upload images in display order; they become pages in sequence |
| Confidential files | Security | Any | Combine watermark + password for dual protection |
Frequently Asked Questions
About This Tool
Privacy statement: This tool processes all documents locally in your browser using Web APIs. No analytics, no tracking pixels, and no file data is ever transmitted to any server. You can verify this by monitoring your browser's network tab while using the tool.