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PDF OCR

Turn scanned PDFs into selectable text with Tesseract — no uploads, no accounts, no watermarks.

100% LOCALTesseract WASMPage rangeEditable output100% local

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La calculadoraPage 1

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Drop a scanned PDF here, or click to browse

English OCR · runs in your browser

Page range

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Drop a scanned PDF and turn its pages back into text

Data Source & Legal Disclaimer

Effective: 2026Last updated: 2026-09-07Update: Manual review

Sources: Tesseract.js (Tesseract 5 WASM)

OCR runs entirely in your browser via Tesseract WASM. On first use the English language model (~15 MB) is downloaded once from a public CDN and cached; your PDF itself is never uploaded.

See all data sources & update policy →

Cómo funcionaPage 2

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Why this OCR is different — and what it honestly can't do

Every page is rasterized at 2× zoom first, because Tesseract accuracy drops sharply on 72 dpi input — the same scan that looks fine on screen is often too coarse to read reliably. The English model (~15 MB) is fetched once on your first run and cached by the browser; from the second document onward OCR starts instantly. Only English is supported — other languages are a real roadmap item, not a hidden limitation. Pages with no recognizable text come back as an explicit [no text recognized] marker instead of an empty gap, so you always know what the engine did.

Scan → 2× raster → Tesseract WASM → editable text

All in the browser: the PDF never uploads, and the recognition model is a one-time ~15 MB download.

Digitizing a 12-page faxed contract — Priya's archive

Priya received a signed contract as a flat scan. Copy-paste returns nothing because there is no text layer underneath the image.

Load the scan:The tool reads the page count (12) and pre-fills the range 1–12; she narrows it to pages 3–9 where the amendment lives
First-run model:The first run downloads the 15 MB English model once — the progress bar says so before it starts, and the next document skips this step
Page-by-page OCR:Each page renders at 2× and is recognized in turn; pages already carrying a real text layer pass through in seconds, photographic scans take longer
Fix and keep:She corrects two misread names directly in the editable output, copies it into the archive system, and downloads contract_ocr.txt as backup

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FAQ y detallesPage 3

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OCR scanned PDFs online free with Tesseract. Everything runs locally; nothing is uploaded.

FreeToolHub PDF OCR is a free browser-based tool — OCR scanned PDFs online free with Tesseract. No signup, no upload; everything runs locally in your browser.

Sobre esta herramienta

¿Qué es esta herramienta?

Haz OCR a PDF escaneados online gratis con Tesseract. Las páginas se rasterizan con zoom 2x para mayor precisión, se procesan por rangos con progreso en vivo y producen texto editable que puedes copiar o descargar como .txt. El modelo en inglés se descarga una vez y queda en caché; tu PDF nunca se sube. 100% en el navegador.

Tesseract WASMPage rangeEditable output100% local

¿Por qué rasterizar a 2x antes de reconocer?

La precisión de Tesseract cae bruscamente con entradas de baja resolución, y el mismo escaneo que se ve bien en pantalla a menudo es solo de 72 dpi: pocos píxeles para formas de caracteres fiables. Rasterizar cada página a un zoom del 2x antes del reconocimiento afila el punto de partida de forma material, y por eso esta herramienta renderiza primero y reconoce después, en lugar de pasarle a Tesseract la página en crudo.

Modelo local, alcance honesto

El modelo de inglés (unos 15 MB) se descarga una vez en tu primera ejecución, se cachea en el navegador, y cada documento posterior arranca al instante: todo el reconocimiento ocurre localmente y tu PDF nunca se sube. Las páginas sin texto reconocible vuelven como marcadores explícitos de «no se reconoció texto» en lugar de huecos silenciosos, el rango de páginas te permite saltarte las secciones no escaneadas de documentos híbridos, y la salida editable significa que los dos nombres mal leídos de un contrato por fax se corrigen en cinco segundos.

Preguntas frecuentes

Why is the first run slower?

On first use the tool downloads the ~15 MB Tesseract English model from a public CDN and caches it in your browser. Every later run starts instantly. The PDF itself is never uploaded - only the one-time model download ever leaves the page.

Which languages are supported?

English only, honestly. Other languages are a roadmap item, not a hidden limitation - the tool would rather say so than silently return garbage on a German or Spanish scan.

How accurate is the OCR?

Accuracy depends on scan quality: clean 300 dpi documents recognize reliably, while faxed or photographed pages will show errors on small text and unusual fonts. The 2x rasterization before recognition materially improves results over raw page images, and the output is editable so corrections take seconds.

Does OCR run on my device or in the cloud?

Entirely on your device — the recognition model downloads to your browser via WebAssembly and processes each page locally. Your scanned documents never leave your machine, which matters for tax papers, medical records, and contracts.

Which languages does the OCR recognize?

The built-in model is strongest on English and Latin-script languages. Handwriting, heavy noise, and non-Latin scripts degrade accuracy — for those, expect to proofread the output rather than trust it directly, and check numbers against the scan.