Searchable PDF
Make a scanned PDF searchable
Add an invisible text layer to a scanned PDF. The document looks identical — but you can now search within it, select and copy text, and screen readers can read it. Free, no upload.
Make my PDF searchable →What is a searchable PDF?
A scanned PDF is a series of photographs. There's no text data — just pixels that look like letters. You can't Ctrl+F to search it, you can't select text, and accessibility tools can't read it. It's effectively an image wrapped in a PDF container.
A searchable PDF solves this by adding a second, invisible layer on top of the images. This layer contains the text at the position each word appears on the page. The visual appearance is unchanged — you still see the original scan — but now the text is selectable, searchable, and accessible.
This is the gold-standard output for OCR: the original document is preserved, no quality is lost, and the file becomes fully functional for search and archiving.
How it works
- 1.OCR reads each page
Each page of your scanned PDF is rendered as a high-resolution image and fed to Tesseract, an open-source OCR engine. It identifies every word and its position on the page.
- 2.Text is placed at word positions
For each word, the tool adds invisible text to the PDF at the exact coordinates where that word appears in the image. The text uses zero opacity so it can't be seen.
- 3.Original images are preserved
Nothing is changed in the image layer. The output PDF contains the same page images as the input, plus the added text layer.
- 4.Search and copy work normally
Open the result in any PDF viewer. Ctrl+F searches across all pages. Text selection highlights the words in the image. Copy and paste extracts the OCR'd text.
Frequently asked questions
- What is a searchable PDF?
- A searchable PDF has two layers: the visible image of the original scanned page, and an invisible text layer underneath. You can use Ctrl+F to search within it, select text to copy it, and screen readers can read it — without changing how the document looks.
- Does making a PDF searchable change how it looks?
- No. The original page images are preserved exactly. The text layer is invisible — it exists only so search and selection work. Open the output in any PDF viewer and it looks identical to the original.
- How accurate is the text layer?
- Each page shows a confidence score. On clean scans, accuracy is typically 90–95%. On lower-quality scans, errors may appear in the text layer, but they don't affect the visual appearance of the document.
- Can I make a searchable PDF from a phone photo?
- Yes — drop a JPG or HEIC photo. The tool wraps it in a PDF page and adds the OCR text layer. The output is a standard PDF with the photo as the page image and searchable text.
- Will the searchable PDF work in Adobe Reader?
- Yes. The text layer is created using standard PDF text drawing with zero opacity. It works correctly in Adobe Acrobat, Adobe Reader, Chrome's PDF viewer, Apple Preview, and most other PDF readers.
- My PDF is already searchable — do I need this?
- No. If your PDF was created from a word processor or already has selectable text, it already has a text layer. The tool detects this automatically and extracts the existing text directly.