Last updated: October 2026
Searchable PDF online free — PDF OCR in your browser
Short answer: a scanned PDF is just pictures of pages — you can’t search it, select text, or copy a paragraph. This tool fixes that with the standard “sandwich” technique: each page is rendered at 150 DPI, OCR’d in your browser (7 languages), and rebuilt into a new PDF that embeds your original page images with an invisible, selectable text layer on top. The pages look pixel-identical; Ctrl+F now works. Free, no signup, and your document never leaves your device.
How it works
1. Drop a scanned or image-only PDF onto the box (or tap it on your phone to pick a file, or tap Load sample PDF to try instantly). The file is read locally — nothing is uploaded. 2. Pick the OCR language matching your document. 3. Click Make searchable. The first run downloads the OCR engine and language data once (cached after that); then each page is rendered at 150 DPI and recognized — the progress bar narrates it live (“Page 3 of 12 — recognizing text…”). 4. Download your searchable PDF, or the extracted text as a .txt file for proofreading.
Password-protected PDFs can’t be opened here — the tool says so plainly instead of failing silently. Very large documents (hundreds of pages) may strain phone browsers; convert in smaller batches if needed.
What is a searchable PDF?
A searchable PDF is a “sandwich”: the visible layer is your original scan, pixel for pixel, and hidden directly on top of it sits real text produced by OCR. Because the text layer is fully transparent, you see only your scan — but your PDF reader, Ctrl+F, and copy-paste all see the text. That’s why scanned contracts, old books, and photographed paperwork become usable documents instead of dead images. Paid desktop tools (Adobe Acrobat’s “Recognize Text”, ABBYY) sell exactly this workflow; here the same sandwich is assembled free, on your own device.
One honest limit: the invisible text layer uses a standard PDF font, which only covers Latin scripts. If you OCR Arabic, Hindi or Chinese, those words still land in the .txt download in full — but the PDF’s hidden layer keeps just the Latin-script words so the file stays valid. The visible scan is untouched either way.
Get the best OCR results from scans
OCR is pattern matching, and scan quality decides the outcome. Scan at 300 DPI if you can — this tool renders pages at 150 DPI internally, and starting from a sharp source matters more than anything. Straighten pages — skewed text is the #1 accuracy killer. Boost contrast — dark text on a clean light background reads best; gray, shadowy phone photos of documents are the hardest input. Pick the right language — the English model on a Spanish document produces confident garbage. Typed beats handwritten — the engine reads print reliably and handwriting barely at all. And proofread anything that matters: the .txt download exists so you can fix the occasional misread before relying on the text.
Frequently asked questions
What is a searchable PDF?
A searchable PDF looks exactly like the original scan, but every word on the page is real, selectable text hiding invisibly behind the image. You can Ctrl+F to find words, select and copy text, and search engines and document tools can index it. This tool creates one with the standard “sandwich” technique: the scanned page image plus an invisible OCR text layer.
Will my scan look different after conversion?
No. Each page of your original scan is embedded pixel-for-pixel into the output PDF, and the recognized text is drawn as a fully transparent layer on top. Visually the pages are identical — the only difference is that text is now selectable and searchable.
How accurate is the text recognition?
On clean, straight scans of printed text it is typically 95%+ accurate. Accuracy drops on skewed, blurry or low-contrast scans, tiny text, decorative fonts, and handwriting, which the engine cannot reliably read. The .txt download lets you proofread and fix anything important.
Which languages can it recognize?
English, Spanish, French, German, Arabic, Hindi and Chinese (Simplified). Pick the right language before converting — the wrong language model produces garbled output. Its data file downloads once (a few MB) and is cached in your browser.
What about password-protected PDFs?
Password-protected PDFs cannot be opened here — the tool will tell you so plainly. Remove the password first (open the PDF in your reader and save or print a copy without a password), then convert the unlocked file.
Is there a page or file-size limit?
There is no hard limit, but everything runs in your browser’s memory: very large PDFs (hundreds of pages or huge scans) can be slow or run out of memory, especially on phones. For big documents, convert in smaller batches — a dozen pages at a time works smoothly on most devices.
Is my PDF uploaded to a server?
No. The PDF renderer, the OCR engine and the PDF builder all run entirely in your browser — your document never leaves your device, is never sent to a server, and is never stored. That is the whole point: scanned contracts and records stay private.
Is this really free?
Yes — free forever, no signup, no watermarks, no page caps on reasonable documents. Paid desktop tools charge for exactly this sandwich-PDF workflow; here it runs on your own device at no cost.
