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Searchable PDF

Make a searchable PDF on iPhone

Add recognized text to a scanned PDF so a compatible reader can find words and copy passages. Export the text layer with the file, then test the saved PDF.

Direct answer: Scan or import the document, choose PDF export, and enable the searchable text layer. Finding the document in the ScanLens library does not confirm that the exported PDF contains that layer.
Download on the App Store

Free to download. Apple shows current trial eligibility and plan access before confirmation. See pricing details.

Create a searchable PDF from a scan or existing PDF

A searchable PDF combines a page image with an embedded OCR text layer. The image displays the scan; a compatible reader uses the recognized text for search and selection. If your PDF already contains usable text, you may not need to run OCR again.

  1. Scan the paper in ScanLens, or import an existing PDF or page photos. Keep the original file if you need an unchanged copy.
  2. Check page order, rotation, and legibility. Retake pages with glare or blurred small print before recognizing text.
  3. Open export, select PDF, and enable the searchable PDF / OCR text layer option. Allow text recognition to finish.
  4. Save the exported PDF to Files or your chosen destination. Give this copy a distinct filename so you can tell it apart from the original.
  5. Open the saved copy in a PDF reader and test a word on several pages before sending it.
ScanLens showing a scanned page with recognized text ready to review and copy 01

Review the OCR text

Check names, numbers, dates, and important wording against the scanned page.

The ScanLens files screen with a search field above scanned documents 02

Find the document later

Library search and PDF search are separate. Verify the exported file in a PDF reader even if ScanLens already finds the document.

Check text search in the exported PDF

Use the reader’s Find action inside the open PDF, rather than searching filenames in Files. Choose a clear, distinctive word from the page, then try selecting and copying a short sentence.

Check the copied text against the scan, especially names, dates, and reference numbers. A successful search alone does not prove the PDF has an embedded layer: some readers recognize images themselves. For a stronger check, use a reader that searches embedded PDF text with automatic image recognition disabled, where available.

If your task is to locate a document rather than a word within it, see finding scanned documents on iPhone.

Why a scanned PDF still cannot find a word

No words are found: check that you opened the new export and that the OCR layer option was enabled. Try another reader with embedded-text search. A missing result by itself does not prove the file is image-only.

Only some words are missed: compare the recognized text with the page. Blur, handwriting, an unsuitable recognition language, line breaks, and similar characters such as O/0 can affect matches. Try a shorter word and improve the scan before exporting again. See scan quality fixes.

Text copies in the wrong order: columns and tables may not copy as they appear. Review the extracted passage before reusing it. The OCR guide covers reviewing recognized text and supported languages.

What happens to the page image and text layer

The exported file displays a page image with invisible text added for search. Export can re-encode that image, so compare small print and page edges with the original. Selection highlights may not align exactly with every printed word.

Moving or attaching the PDF normally carries its embedded text with it. Sending a screenshot or exporting page images does not preserve that PDF text layer. After conversion, compression, or other processing, reopen the final file and repeat the search test.

Frequently asked questions about searchable PDFs

Which OCR language is used when exporting a searchable PDF?

ScanLens can reuse existing OCR blocks. If export needs to recognize a page, it currently runs English recognition. The separate text-recognition tool supports 14 languages, but that does not guarantee the exported PDF will search every language correctly. Test words in the saved file.

Does a searchable PDF let me edit the printed words?

The OCR layer provides recognized text for search and copying; it does not turn the page image into editable paragraphs. For text you want to rewrite, extract and review it, then paste it into a document editor.

How much larger are searchable PDFs?

A searchable PDF can be larger than the same image-only scan because it also stores recognized text and its position on the page. The exact difference varies by document, page count, image settings, recognized text, and export options.

Can confidential documents be made searchable without uploading them?

Yes. OCR recognition and searchable PDF creation run on the iPhone without uploading the document to ScanLens for processing. A file leaves the selected storage location when you share it, back it up, or export it to a cloud service.

Can I make a PDF searchable for free?

Searchable PDF export belongs to the paid feature set — the pricing page lists the plans. Worth knowing what is free anyway: recognition runs on your scans in the background, so searching inside your own library already works without unlocking anything. The paid part is embedding that text layer into a file you send elsewhere, so the recipient can search it too.

Related OCR and PDF scanning guides

OCR text scanner for iPhone

Recognize, review, copy, translate, and export text from scans, photos, and PDFs.

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Review PDF editing options for pages, annotations, signatures, and export.

Handwriting to Text

See where handwriting recognition helps and where manual review is still necessary.

Digitize Documents

Build a searchable paper archive with clear naming, folders, and backups.
Search scanned text

Create a searchable PDF on iPhone with ScanLens

Add an OCR text layer on iPhone, check the recognised words, and use Find in a PDF reader that supports the layer.

Download on the App Store