You open a PDF, press Ctrl+F, type a word you can clearly see on the page, and get "no results". That PDF is not searchable. It was scanned or photographed, so each page is a picture, and pictures contain no letters a computer can find.
A searchable PDF keeps the same pictures but adds the words behind them, in the right positions. This page explains how to tell which kind of PDF you have, how to make a scanned one searchable with the tool above, and how to make sure future scans come out searchable from the start.
Three ways to check if a PDF is searchable
- Search for a word. Press Ctrl+F (Cmd+F on a Mac) and type a word you can see on the first page. If it is highlighted, that page is searchable.
- Try to select text. Drag across a sentence with your mouse. In a searchable PDF the words highlight one line at a time. In a scan, nothing highlights, or the whole page turns blue like an image.
- Copy and paste. Copy a paragraph and paste it into Notepad or TextEdit. Real words mean it is searchable. Nothing, or a few random characters, means it is not.
Check more than one page. Mixed PDFs are common: a typed report with signed pages scanned in at the end, for example. The tool above handles those too, because pages that already have text are left alone.
How to make a PDF searchable
- Drop the scanned PDF onto the box at the top of the page. A JPG, PNG or TIFF scan works too and becomes a one-page PDF.
- Read the note under the file name: it shows the page count and warns you if the PDF already seems to contain text.
- Select the language of the document. English is preselected; you can choose up to three languages for mixed documents.
- Click Make it searchable and wait while the pages are uploaded, queued and read.
- The searchable PDF downloads automatically, named with "-searchable" at the end so it does not overwrite your original.
- Open it and search for a word to confirm it worked.
For more on how the recognition works, which languages are available and how to scan for the best accuracy, see the OCR PDF guide.
Searchable, editable and scanned: the three kinds of PDF
| Kind of PDF | How it was made | Search and copy | Edit text |
|---|---|---|---|
| Scanned (image only) | Scanner, phone photo, fax | No | No |
| Searchable (image plus text layer) | A scan after OCR | Yes | No, the page is still a picture |
| Text-based (digital) | Exported from Word, Google Docs or an app | Yes | Yes, with a PDF editor or after PDF to Word |
The middle one is what this tool creates. It is the right format for archives, contracts, signed forms and anything where the exact look of the original matters, because the page images are untouched. If your goal is to rewrite the content, a searchable PDF is a step on the way: you can copy its text into a document, but the page itself does not become editable.
Why searchable PDFs are worth the extra step
- Finding things: search one long document, or a whole folder of them with Spotlight on a Mac, or in Google Drive, Dropbox and other services that index PDF text.
- Copying: take a clause, an address or a reference number from a scan without retyping it.
- Accessibility: screen readers can read searchable PDFs aloud. A scan with no text layer is silent to them.
- Publishing online: Google indexes the text inside PDFs it finds on websites. A searchable PDF hands it the words directly, so a brochure, menu or manual you post can show up for the terms inside it.
- Sharing: the person you send it to can search it too, on any PDF reader, without installing anything.
Make your next scans searchable from the start
Converting old scans is a one-time job. For new ones, it is easier to get a searchable PDF straight from the scanner:
- Scanner software: many desktop scanner apps have a "Searchable PDF" or "OCR" option in their save settings. Turn it on once and every scan comes out searchable.
- Multifunction office printers: look for "Searchable PDF" or "PDF (OCR)" as the file type when scanning to email or a network folder.
- Phones: scanner apps make clean PDFs, but not every one adds a text layer. Test by searching a scanned page; if it fails, run the file through this tool.
- Adobe Acrobat Pro: its Scan and OCR tool recognizes text in existing PDFs, as part of a paid subscription. This page does the same job for free, one file at a time.
Tip: Scan text pages at 300 DPI in grayscale. It is the setting that gives OCR the best chance on small print, without the huge files that color scans create.
Several scans at once
The tool takes one file at a time. If you have a stack of separate scans, you have two options:
- One by one: best when each file is a separate document you will keep separately, such as receipts or letters. Each counts as one file toward the daily free limit.
- Merge, then OCR: combine related scans with Merge PDF in your browser, make the merged file searchable here, and split it again with Split PDF if you need separate files. This uses one free conversion for the whole batch, as long as the merged file stays under the size limit.
Name and store searchable scans so you can find them
Search inside the file is half of the job. The other half is a file name you can sort and recognize. A simple pattern works for most people and small businesses:
| Part | Example | Why |
|---|---|---|
| Date first, year-month-day | 2026-10-14 | Files sort in date order in any folder |
| Who it is from or about | acme-supply | The name you will remember |
| What it is | invoice-4471 | Type plus a reference number |
Put together: 2026-10-14-acme-supply-invoice-4471.pdf. One folder per year, with the searchable PDFs inside, is enough structure for most paper archives.
Checking the result
A searchable PDF can look perfect and still have recognition mistakes in its hidden layer, because you see the scan, not the text. Do two quick checks:
- Search for three or four words from different pages, including a name and a number. If they are found, the layer is in good shape.
- Copy a paragraph into a text editor and read it. Odd characters, such as "rn" instead of "m" or "0" instead of "O", point to a blurry scan. Rescan those pages if the text matters.
To pull all the text out at once, open the searchable copy in PDF to Text. To shrink a large scanned file before you email it, use Compress PDF after OCR, and search it again to confirm the text layer survived.
Privacy and limits
The file is uploaded over HTTPS to our server for OCR, and only the file, the tool name and your language choice are sent. The upload is deleted as soon as the job ends and the searchable PDF 30 minutes after it is ready. There is a daily number of free files per visitor and a maximum file size, both shown on the tool. Handwriting is not recognized reliably, and sideways pages should be turned upright first with Rotate PDF.