How to Make a PDF Searchable: Convert a Scan to a Searchable PDF
Convert a scanned, image-only PDF into a searchable, readable, copyable document with OCR — in a few clicks, in 21 languages. Free to use, no account needed.
Short answer: Open the OCR tool, upload your scan, select the language the document is written in, and download a PDF you can search and copy from. Pages that already contain text are skipped automatically.
A scanned PDF is really just a picture of a page — you can't select the text or find anything with Ctrl+F. OCR fixes that by recognising the characters and adding a searchable text layer behind the image.
First, check whether you actually need OCR
Open the PDF and try to select a line of text with your mouse:
| What happens | What to do |
|---|---|
| Individual words highlight | Nothing — the text is already real and searchable |
| The whole page selects as one block | Run OCR |
| Nothing selects at all | Run OCR |
Running OCR on a PDF that already has text isn't harmful, but it won't change anything either. The tool skips those pages rather than re-recognising them.
How to convert a PDF to a searchable PDF
- Upload your scanned PDF to the OCR tool. Files up to 50 MB are supported.
- Choose the document language — the single setting that most affects accuracy. There are 21 to pick from.
- Download the searchable PDF. You can now use Ctrl+F, select text, and copy from it.
The file you get back is the same PDF, in the same format, at the same size on screen. Nothing is redrawn. The only difference is the text layer underneath, which is exactly why the result looks like nothing happened.
"Scannable", "readable", "searchable" — the same request
These words get used interchangeably, and they all point at one problem: a document a computer can display but not read.
| What people ask for | What they need |
|---|---|
| Make this PDF searchable | OCR |
| Make this PDF readable | OCR |
| I need a scannable PDF of this | OCR |
| Turn this scan into a normal PDF | OCR |
| Convert this to a searchable PDF | OCR |
One exception is worth knowing: "readable" occasionally means legible — the scan is blurry or crooked and hard for a human to read. OCR won't help with that, because it doesn't touch the image. Rescanning does.
Choosing the language
OCR engines use language-specific models to recognise letters and words. Selecting the correct language:
- improves accuracy on accented characters (ç, ş, ü, é, ñ…),
- reduces misread words, because the dictionary corrects unlikely results,
- and is faster than loading several languages at once.
The list covers 21 languages: English, Turkish, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Romanian, Czech, Swedish, Danish, Norwegian, Finnish, Arabic, Japanese, Korean, Simplified Chinese, Indonesian and Vietnamese.
What the "I don't know" option really does. It runs a small set of common Latin-script languages — English, German, French and Spanish — together. It is a genuine fallback for a document you can't identify or one that mixes those languages, but it is not every language in the list: loading all 21 would be several times slower on every page, and models for other scripts (Arabic, Japanese, Korean, Chinese) have nothing useful to contribute to a Latin page while still getting a vote on it. If your scan is in Japanese or Arabic, pick it from the list — the fallback won't find it.
What OCR does — and doesn't do
- ✅ Makes scanned/photographed PDFs searchable, readable and copyable.
- ✅ Keeps the page looking exactly the same.
- ✅ Skips pages that already have real text.
- ❌ Does not convert the PDF into an editable Word file — use a PDF-to-Word tool for that.
- ❌ Does not reliably read handwriting.
- ❌ Does not sharpen, straighten or clean up the image you can see.
Good scans give better results
Most OCR mistakes are decided before OCR runs, by the quality of the image:
- Scan at 300 DPI. Below about 200 DPI, similar letter shapes become hard to tell apart.
- Keep pages straight. Skew is corrected automatically, but starting straight gives cleaner results.
- Avoid shadows. This is the usual culprit with phone photos — a shadow across the page blurs the line between ink and paper.
- Prefer scanner output to photos when you have the choice.
The cleaner the image, the fewer mistakes OCR makes. If a result comes back poor, rescanning at a higher resolution almost always helps more than re-running OCR.
After OCR
Once the text layer exists, the document behaves like any other text PDF. Common next steps:
- Convert it to Word if you need to edit the content as paragraphs.
- Extract its tables to Excel if the scan contains data you need to work with.
- Compress it — scans are large, and the text layer adds a little more.
- Split it if the scanner handed you one long file containing several separate documents.
If you want the background rather than the steps — what the term means, what OCR scanning is, and why there's no such thing as an "OCR file format" — see what OCR is.
What it costs
The OCR tool is free to use, with no account and no daily limit — upload as many documents as you like and see the result before deciding anything. Downloading the finished file requires a subscription, which you can cancel at any time.