Edit PDF Online — Add Text, Highlight, Erase
Write, highlight, add text, insert images and signatures, and erase directly on a PDF — free, in your browser, with no upload.
A complete set of editing tools on one page: a freehand pen, a highlighter, text boxes you can drag into place, image and signature insertion, an eraser, and correction tape for covering mistakes.
How to edit a PDF (3 steps)
- Open your PDF. The pages appear, ready to edit.
- Pick a tool: pen, highlighter, text, signature, eraser, or correction tape.
- Save, check the preview, and download.
What "editing a PDF" can and cannot do
Many people expect to edit the existing text in a PDF the way they would in a word processor. In reality, PDF is designed as a finished document with a fixed layout, so changing the original text directly is very limited — even in expensive paid software. Here is an honest guide to what this tool is good for:
- Add text on top, such as a date, a name, or a reference number — yes. Type it and drag it into position.
- Underline, highlight, or circle key points — yes, with the drawing tools on this page.
- Hide information you do not want seen — yes, with Redact PDF, which bakes the result in as a permanent image.
- Add a signature — yes, or use Sign PDF.
- Fix a typo in the existing text — indirectly. Cover the old word and type the new one over it, or convert the file to Word and edit it there.
- Re-lay out the whole document — not something to do in a PDF. Go back to the source file, or convert to Word.
Tips for text that blends in
- Zoom in to check the size of the existing text before you type, and match it closely. Text that is noticeably bigger or smaller makes a document look altered.
- Use solid black on black-and-white documents, and avoid bright colours on formal paperwork.
- Sit the text on the existing line. If the form has dotted lines to fill in, place your text right on the line, not floating above or below it.
- For documents you fill in often, turn them into a fillable form with Make Fillable Form so you do not have to position text by hand every time.
- Flatten when you are done with Flatten PDF if you do not want the recipient to move or delete what you added.
A security warning about covering text
Drawing a black box over confidential information in an ordinary editor does not actually remove it — the text is still underneath and can be copied out. If you need to hide ID numbers, account numbers, or other personal data, use the Redact PDF tool, which converts the page into an image so the original information is really gone.
Why editing in the browser suits important documents
The documents people need to edit often contain personal details: applications, contracts, official forms with ID numbers. Uploading files like these to an unfamiliar website is an unnecessary risk when the work can be done in the browser. That is the approach MyPDF takes. The file is read and edited in your device's memory; there is no upload step.
FAQ
How flexible is the added text?
Fully — Thai text is supported too. Type anywhere on the page, then drag, resize, and edit it again as often as you like before saving.
Can I delete the original text in the document?
Use the correction tape, which covers it with white, then type new text on top. The original text is still underneath the white strip, so for confidential information use the Redact PDF tool instead.
How do I add a signature?
Draw it on the spot, upload an image of your signature, or use a signature you have saved in your account.
Is it safe for confidential documents?
Yes. Editing happens in your browser and the file is not uploaded.