Mark up important passages with a natural highlighter look — any colour, any opacity.
Drop a PDF here or choose a file
Up to 50 MB and 300 pages
Private by design: your PDF is edited in your browser and never uploaded.
Choose the document to mark up.
Draw over the text you want to emphasise.
Highlights are saved into the PDF.
Unlike most online editors, FileFlexify edits PDFs entirely in your browser.
Your document is opened, edited and saved locally — ideal for contracts, IDs and financial records.
No watermarks, no branding. Edited text stays real, selectable text.
Replaced text is searchable and copyable — exactly like the rest of the document.
Click any line to change it. The original text is removed from the file and your new text uses the same font, size and colour.
Update a name, date or price on every page at once — every line keeps its formatting.
Draw, type or upload your signature and place it anywhere.
Erase text and images. Content under a whiteout is removed, not just hidden.
Natural highlighter effect plus text boxes in any font, size and colour.
Automatic detection of Word/Acrobat watermark layers, text stamps and repeated background images.
No — highlights blend with the page like a real highlighter, so text stays readable.
Yes, pick any colour and adjust the opacity.
No. The editor runs entirely in your browser, so your document never leaves your device.
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