loopdf.com
Edit PDF

Free Online PDF Editor

Edit PDF documents online with loo - annotate, sign, fill forms, edit existing text, and export in seconds. No account, no watermarks, completely free.

Everything you need to edit a PDF — included

Annotate anything
Text boxes, signatures, images and drawings sit on top of the page as PDF objects. The original stays untouched and every element stays selectable.
Sign documents
Draw or type your signature, place it precisely, resize and rotate freely. No account, no watermark — download in seconds.
Edit existing text
Switch to Edit mode to change text already inside the PDF. Fix typos and numbers; the editor matches the original font automatically.
Add new content
Insert text, images, shapes, freehand drawings and emoji anywhere. Everything stays repositionable and resizable after placing.
Fill Forms
Need a blank form to fill out? Browse our library of ready-to-use PDF forms - open any one directly in loo and fill it for free. Missing a specific form? Let us know.
Manage pages
Reorder, delete or extract pages from the thumbnail panel. Reorganize multi-page documents visually before saving.
Protect on export
Set a password before downloading. AES-256 encryption is applied in your browser, with printing and copying permissions configurable.

Edit a PDF in four steps

  1. Open your PDF Click Open or drag a file onto the editor. Works on Mac, Windows and mobile — nothing to install.
  2. Annotate or Edit Annotate overlays new content without touching the original. Edit mode changes text already inside the document.
  3. Add and adjust Pick a tool, drag elements into position, pull corners to resize, and use Ctrl+Z to undo any step.
  4. Download Open File → Download. Your edited PDF saves straight to your device — free, no watermark, no account.

Why Choose loo as Your Online PDF Editor as a Student

  • Free for every student. Students work with PDFs all the time and rarely have money to spare. loo is completely free, so you can keep learning toward your goals and save your budget for the things that matter.
  • No ads, no account, no bait. Open the page and start editing right away. You are never baited into ads or forced to create an account before you can download your finished file.
  • Made for study anywhere. Runs in any modern browser on Mac, Windows and mobile, so you can edit lecture notes, assignments and forms wherever you study.
  • Honest about your data. Annotating runs locally on your device. Edit mode uploads briefly to extract content, then deletes it. Nothing is stored.

Common questions

Still stuck? Contact us.

Annotate PDFs, add signatures, insert text and images, draw freehand, edit existing text, manage pages, fill forms and password-protect your file — all free, no account required.

Annotation mode runs entirely on your device — your file never leaves it. Edit mode sends the PDF to extract text, then deletes it immediately. We never store, log or share files.

Yes. Switch to Edit mode and loo extracts the existing text and layout so you can fix typos, update numbers and rewrite sentences. It matches the original font where possible.

Never. What you put in is exactly what comes out — there is no paid plan and no watermark to remove, because they simply do not exist.

Open your PDF in loo, select the Signature tool from the toolbar, and either draw your signature with a mouse or trackpad, or type it out. Place it anywhere on the page, resize and rotate freely, then download the signed PDF instantly. No account or registration needed.

Annotate places new objects on top of the page and runs locally. Edit mode briefly sends your PDF to the server to extract and modify existing text, then deletes it. Use Annotate for most tasks.

Scanned PDFs are image-based: each page is a photograph of a document with no text layer. Edit mode cannot modify image pixels, so you cannot directly change the scanned text. What you can do is use Annotate mode to place a white rectangle over the area you want to cover, then add a new text box on top with the corrected content. For full text recognition in scanned documents, use the OCR tool first to generate a searchable PDF, then open it in the editor.

Yes, annotations increase file size slightly because each element is stored as an object in the PDF structure. Signature drawings are saved as vector paths, which are small. Image annotations are larger. If file size matters, use the compress tool after editing. Edit mode changes are written directly into the existing content stream so the size impact is minimal for text-only edits.

loo from loopdf works on any device with a modern browser - iPhone, Android, Windows PC, and Mac. The editor adapts to your screen size and gives you the full feature set on mobile: annotations, signatures, text editing, and form filling, without downloading a separate app.

Annotations and form filling in loo from loopdf run locally - they do not require a server call, so they work offline once the page has loaded. Text editing (Edit mode) does require a connection because it sends the PDF to our server briefly to extract the content.

loo from loopdf is a solid PDF editor for Mac - it runs directly in Safari, Chrome, or Firefox with no installation required. You get the full feature set: edit PDF text, annotate pages, sign documents, and fill forms. No compatibility issues, no app to maintain, nothing stored on your system.