Are my signatures stored on your servers?

No. Your drawn signature and all annotations exist strictly in local browser memory and are never transmitted to or retained on remote servers.

Can I undo or redo edits while annotating?

Yes! PDFAtlas features full undo/redo history controls so you can easily step backward and forward through your edits.

Can I add geometric shapes and highlights?

Yes! You can draw rectangles, circles, freehand pen lines, and semi-transparent highlighter strokes in various colors and stroke widths.

100% Client-Side Privacy • Zero Server Uploads

Online PDF Editor & Annotator

Annotate your PDF files directly in your browser. Add text notes, draw with pen, highlight important passages, add shapes, and sign documents.

Drop your PDF here to edit

Select a PDF document to annotate and sign

100% Client-Side Privacy•Free & Unlimited•Up to 100MB

About PDF Editor with PDFAtlas

Reviewing drafts, grading assignments, and signing contracts shouldn't require installing heavy desktop software. PDFAtlas provides a lightweight, interactive canvas editor right in your browser.

Place text annotations, draw freehand lines, highlight key phrases, insert geometric shapes, and draw your signature. All annotations are flattened cleanly onto standard PDF vector streams upon export.

Comprehensive Tools

Text, freehand pen, highlighter, rectangle, circle, and signature pad.

Undo / Redo Support

Full history stack to easily reverse or re-apply annotations.

Universal Compatibility

Exports standard flattened PDF files readable on all platforms.

How to Use PDF Editor

Follow three simple steps to complete your document task without installing software or creating an account.

Open Document in Editor

Upload your PDF to load the interactive annotation canvas workspace.

Add Annotations & Signature

Use the toolbar to insert text notes, draw with pen, highlight lines, or draw your signature.

Save and Export PDF

Click "Save & Export PDF" to generate a flattened document compatible with all PDF readers.

Local Browser Privacy

Files are processed directly inside your browser. No files are uploaded or stored on remote servers.

Blazing Fast Execution

Zero network upload delays. PDF operations execute instantly using high-performance WebAssembly and JavaScript engines.

Works on Any Device

Fully optimized for desktop, tablet, and mobile browsers on Windows, macOS, iOS, and Android.

Frequently Asked Questions

Clear answers to common questions about PDF Editor and PDFAtlas security.

Yes! PDFAtlas burns all text, drawing paths, and signatures directly into standard PDF specification streams, ensuring compatibility across Acrobat, Apple Preview, and mobile readers.