Edit PDF Text — Add Text & Fix Existing Text
Add new text anywhere, or click Fix Text to auto-detect existing text and cover-and-replace it in place. Pro Mode adds OCR for scanned pages, font family, custom colors and undo/redo.
How to Edit a PDF
From a typo or blank field to a fixed, downloadable PDF in a few clicks — no signup, nothing ever leaves your browser.
Everything above runs entirely in your browser — your PDF is never uploaded to a server, so your document stays completely private from start to finish.
Edit PDF Text Online — Add or Fix Text for Free
Editing text in a PDF means adding new text or correcting existing text directly on the page, then saving a new file. This tool does both entirely in your browser using pdf.js to render pages and pdf-lib to rebuild the finished file — nothing is ever uploaded to a server to make the change.
A typo in a finished contract, a form field with no fillable box, or a scanned document that needs one line corrected are all common reasons people search for a way to edit PDF text without opening the original source file — which often no longer exists, or was never a PDF-editable format to begin with. Desktop suites solve this with a subscription and an install; this does the same core job in a browser tab, free, on Mac, Windows, Linux, Chromebook or mobile.
1Add Text vs Fix Text — Which One to Use
| Tool | What It Does | Best For |
|---|---|---|
| Add Text | Places brand-new text anywhere you click on the page | Filling blank fields, adding notes or signatures dates |
| Whiteout | Draws a solid cover box over any area, manually | Removing an image, logo or block of text entirely |
| Fix Text | Auto-detects existing real text so you click and retype it in place | Correcting a typo or updating a date/name in real text |
| OCR Detect Text (Pro) | Reads text out of a scanned image so it can be covered and fixed | Scanned documents with no real text layer |
2Simple vs Pro — Editing Control
| Feature | Simple Mode | Pro Mode (Free) |
|---|---|---|
| Add new text anywhere on a page | ✓ | ✓ |
| Fix Text — auto-detect and retype existing text | ✓ | ✓ |
| Whiteout / cover boxes | ✓ | ✓ |
| Move, resize or delete added elements | ✓ | ✓ |
| OCR text detection on scanned pages | — | ✓ |
| Font family (Helvetica, Times, Courier) | — | ✓ |
| Bold / italic and custom text color | — | ✓ |
| Undo / redo | — | ✓ |
| Page thumbnail strip & elements panel | — | ✓ |
3Common Reasons People Edit a PDF
Most of these edits are small — a wrong year on a certificate, a form that has no fillable field for a required answer, a name that needs updating on a template used repeatedly. Fix Text handles the correction cases directly: click the existing text, and it's ready to retype without hunting for a whiteout box size or matching the exact font by eye.
Fix Text scans the page for text runs, samples the background color behind the detected text, covers that region, and places an editable text box on top styled to match as closely as possible. It's a cover-and-replace approach, not a rewrite of the PDF's internal content stream — which is why it works reliably across virtually any PDF without needing to parse or reconstruct the document's original font and layout data.
4What This Tool Can't Do
Being upfront about the limits matters more than making bigger claims. This tool doesn't reflow paragraphs the way a word processor does — each text edit is its own independent element, so a long replacement won't automatically wrap around other page content the way it would in the original layout software. It also doesn't rewrite the PDF's underlying content stream directly, so highly unusual embedded fonts occasionally won't be matched pixel-for-pixel by the cover-and-replace approach. For the vast majority of contracts, forms, certificates and scanned documents, none of that matters in practice — the result looks like a clean, correct edit — but it's worth knowing before relying on it for a document with dense, tightly-wrapped paragraph text.
5Frequently Asked Questions
Built on real, open-source libraries — page rendering runs on pdf.js, OCR in Pro Mode runs on Tesseract.js, and the final file is assembled with pdf-lib, following the ISO 32000 PDF specification rather than a proprietary editing format.
Related Tools
The rest of PDF Studio — other free PDF tools that pair well with editing