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Mofumi PDF

Edit PDF

Beta

Click any line of text to retype it, or find and replace words across the whole document — right in your browser.

100% Private — files never leave your device
Upload PDFDrop files here or click to chooseAccepted: PDF Files never leave your device

About this tool

Edit PDF lets you fix typos, update dates, prices or names without going back to the original Word file. The page is shown exactly as it prints; every line of real text becomes clickable. Type the new wording, pick a colour, and Mofumi covers the old line and writes the new one in its place using an embedded Unicode font (Sarabun), so Thai and English both work.

Find & replace searches every page at once and turns each match into an edit you can review in the list below the page before saving. Nothing is uploaded: the PDF is read and rewritten on your own device.

This tool is in beta. It replaces text line by line rather than reflowing whole paragraphs — true paragraph reflow needs a heavyweight layout engine that we don't ship. Very long replacements may run past the original line, and scanned pages have no real text to click (run OCR first).

Engines: pdfjs · pdf-lib

How to use

  1. 1

    Open your PDF.

  2. 2

    Click a line and type the new text, or use Find & replace for every page.

  3. 3

    Click “Save edits” and download the updated PDF.

Use cases

  • Fix a typo in a signed-off file

    Correct a misspelt name or a wrong date without re-exporting the whole document.

  • Update prices or dates

    Replace “2025” with “2026” or an old price on every page in one go.

  • Reuse a template

    Turn last month's letter into this month's by retyping the recipient and reference number.

Frequently asked questions

Can I edit scanned PDFs?

Only if they contain a text layer. Run OCR PDF first so the words become real text you can click.

Will the font match the original?

The new text uses Sarabun (a clean sans-serif with Thai support) at the original size. It is close but not always identical to the original font.

Is the old text really gone?

The old line is covered with a white box and the new text is drawn on top. For sensitive information use Redact PDF, which removes the underlying text.

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