Edit PDF
Page numbers, watermarks, headers, cropping, stamps and signatures.
About edit pdf
Adding to a PDF is straightforward; changing what is already in one is not. These tools do the first thing well — drawing new content onto existing pages, which pdf-lib handles cleanly and losslessly. Editing existing text is deliberately absent, and the reason is worth understanding: a PDF stores positioned glyphs, not sentences. Changing a word means reflowing the line, handling a subsetted font that may not contain your new characters, and rewriting the content stream. Acrobat charges money for this and still gets it wrong.
Common questions
Are these tools really free?
Yes, all 0 of them, with no signup, no watermark and no file limits. There is no premium tier holding features back. The site is supported by advertising, not by charging you for the tool.
Do I need to install anything?
No. Everything runs in your browser using standard web APIs. No app, no extension, no account.
Are my files uploaded to a server?
No. Every tool in this category processes your data inside your own browser tab. You can verify this in your browser's Network tab — there is no upload request because there is no server.
Do these work on a phone?
Yes. Every tool is mobile-first and touch-friendly. Heavy operations — rendering large PDFs, processing very large images — will be slower on a phone than a laptop, because the work happens on your device.