Free PDF Editor — Add Text & Cover Mistakes

Yes — completely free with no sign-up and no watermark on the result.

No. Every edit is applied entirely in your browser — the file never leaves your device.

Yes — pick Fix text and tap a line. It opens with the original wording already in it, at roughly the size it was set in, so you can correct a typo and move on. What actually happens underneath is that the line is covered over and your version is drawn on top: a PDF's text is not stored as editable paragraphs, so nothing can rewrite it in place. In practice that works well on an ordinary white page. On a coloured or patterned background the patch will show, and there the Cover and Text tools give you more control.

It gets close. The line is matched to the nearest of the three typefaces every PDF reader already has — a serif one like Times, a monospaced one like Courier, or a sans-serif one like Helvetica — and bold and italic are carried across. That is usually indistinguishable in a document set in a common font. A distinctive brand typeface cannot be copied, because reusing a font embedded in the file would mean rebuilding it, so the closest standard face is used instead. Replacements also always come out black: a PDF does not report the colour of its text alongside its position, so there is nothing to copy. You can restyle any of it afterwards from the toolbar.

It is set a little smaller so it still fits. A PDF has fixed layout — nothing can push the paragraph below out of the way to make room — so the alternative would be text drawn on top of the next line. The tool measures the gap between the line you are replacing and whatever is under it, and reduces the size until the words fit that gap. A small change in wording usually needs no reduction at all. If it cannot be made to fit even at the smallest size, the text is outlined in red and you can shorten it or use Cover and Text instead.

A PDF does not store sentences — it stores runs of glyphs at positions, and where one run ends is up to whatever produced the file. Runs sitting on the same line with no real gap between them are joined up first, which usually gives you the whole line, but an unusual layout can split it. If the wrong piece comes up, undo and use Cover plus Text instead.

No — a cover box is a plain white rectangle drawn on top, so it only hides the content from view. The text underneath is still in the file and can still be selected and copied out of it, or read by any tool that extracts text. Never use a cover box to hide confidential information: use Redact PDF or Auto-Redact PII, which remove the content itself.

PNG and JPEG go straight in. Anything else your browser can open — WebP, GIF, BMP — is converted automatically, and very large pictures are scaled down first so they do not bloat the finished file. Transparency in a PNG is kept, so a logo sits on the page without a white square behind it.

No, and it is not meant to. The ink is translucent and blends with the page the way a real marker does, so the words stay readable. To hide something use a cover box, or Redact PDF if it is confidential.

You can drop in a photo or scan of one with the Image tool. For drawing a signature by hand, or typing one, use the dedicated Sign PDF tool.