OCR PDF & Images

OneClickPDF's OCR tool extracts searchable text from scanned PDFs, JPG, PNG, and WEBP images entirely in your browser — no file upload, no account required. It includes six features only otherwise found in Adobe Acrobat Pro ($20/mo): side-by-side preview, confidence highlighting, region selection, edit text before downloading, find and replace, and page range selection. It also adds table detection with CSV export and batch multi-file processing, which Adobe Acrobat Pro does not include in its OCR workflow. Supports 16 languages with automatic language detection. SmallPDF requires a Pro subscription. iLovePDF caps free users at 10 files per day. OCR.space limits free processing to 1 MB. PDF24 uploads files to its server. This tool has no cap, no upload, and no cost.

Open any scanned PDF, JPG, PNG, or WEBP image and the OCR engine processes each page in your browser using WebAssembly. Your file never leaves your device at any point. The side-by-side preview shows the original document next to the recognized text in real time, with scroll-synced panels so you can follow along page by page.

Confidence highlighting marks low-certainty words in a different colour, so you know exactly where to look for errors without reading through the entire output. Use region selection to draw a box around a specific form field or column you want to extract, rather than processing the full page. Find and replace lets you correct recognition errors before downloading. For documents with tables, the tool detects the table structure automatically and exports it as a CSV file — a feature not offered by any other free OCR tool in this comparison.

When to Use This OCR Tool

• Making a scanned legal contract searchable. Drop the scanned contract PDF onto the tool. The OCR engine processes each page in your browser — no upload occurs — and generates a text layer. Use confidence highlighting to identify any uncertain words and correct them in the edit panel before downloading the searchable PDF. The document never leaves your device, which is important for contracts containing commercially sensitive terms.
• Extracting invoice table data into a spreadsheet. Open a scanned invoice PDF. The table detection feature identifies the line-item table structure automatically and exports it as a CSV file. Import the CSV directly into Excel or Google Sheets for bookkeeping without retyping a single row. No other free OCR tool in this comparison provides full table detection with CSV export.
• Perform OCR on a specific form field with region selection. For a multi-page form where you only need the data from a specific field on page two, use region selection to draw a box around just that area. The OCR engine processes only the selected region, ignoring everything else on the page. This saves time and reduces noise in the output when you need one field from a complex document.
• Batch processing a folder of scanned PDFs. Drop multiple scanned PDF files onto the tool simultaneously. Batch multi-file processing runs each file through the OCR engine sequentially in your browser. When all files are done, download all results as a single ZIP archive. SmallPDF requires a Pro subscription for this. iLovePDF requires Premium. This tool runs unlimited batch OCR free with no subscription.
• Correcting OCR errors before saving. After OCR completes, confidence highlighting shows which words the engine was less certain about. Review those words in the side-by-side panel, make corrections in the edit text field, and use find and replace to fix recurring errors like a misread company name across 20 pages. Download the corrected searchable PDF with the accurate text layer embedded.