Annotate
Highlight, underline, strike through, and add margin notes. Every mark stays crisp and stays yours.
100% free — no sign-up
Mark up your PDFs with
Mark up your PDFs with
surgical precision
Folio gives you the tools to annotate, edit, and sign documents with the care they deserve. Everything stays in your browser.
Runs in your browser
Free, no sign-up
Nothing to install
Service Agreement
FOL-2026-0042This Agreement is entered into between the LicensorDefine party and the Licensee as of the Effective Date.
The Licensor grants the Licensee exclusive rights to distributeClarify territory the Work in all formats, subject to the terms herein.
Section 4.2Review terms governs the royalty structure for subsidiary licensing arrangements.
Either party may terminate this Agreement upon thirty (30) days written notice.
Define scope of IP rightsReviewed
0
PDF tools
0
To install
0
Free, forever
Capabilities
Everything you need to work with PDFs
Annotate, edit and sign in one workflow — 100% free, no limits, nothing to install.
Edit
Change text, rearrange pages, and adjust layouts without leaving the document. Full fidelity, always.
Sign
Draw, type, or upload your signature. Certified signatures that hold up anywhere they're sent.
How it works
Three steps, no account
Open the editor, pick a tool, and get your file back. Nothing to install and no sign-up.
Open your PDF
Drop a file into the editor. It is read in the browser, so editing it never uploads it.
Click the text you want to change
The page renders with its real text on top: click a word and type over it, keeping its size and font.
Export the result
Download the edited PDF. The file on your device stays untouched.
Workflow
Annotations that look like they were made on paper
Every highlight, underline, and margin note renders at full resolution. Export with annotations baked in or send a clean copy — your choice.
- Layer-based — annotations sit on their own layer until you're ready to flatten
- Consistent — the same result in every browser, with no plugin and no install
- Export ready — PDF/A, flattened, or annotated — whichever your recipient needs
100% free — no sign-up
Your documents,
Your documents,
marked up beautifully
No sign-up, no uploads, no limits. Everything runs in your browser and your files never leave your device.
Open the PDF editorWorks in Chrome, Firefox, Safari, and Edge. Nothing to install.