Extract text from BMP bitmap images using OCR for legacy Windows software and scanners. No compression artefacts. 15 languages. No uploads.
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Extract text from BMP bitmap images from legacy Windows applications, industrial systems, and older scanners. BMP stores raw uncompressed pixel data — no artefacts, no blurring — making it reliable for OCR in machine-generated and archival workflows. Supports 15 languages. All processing happens in your browser — no uploads.
Upload your BMP file
Drag and drop your BMP bitmap image onto the drop zone, or click Browse files to select one from your device. BMP files from Windows Paint, scanner software, or legacy document systems are all supported. Maximum file size is 10 MB — note that BMP files can be large due to the lack of compression, so very high-resolution bitmaps may need to be resized first.
Select the language of the text
Use the language selector to choose the language of the text in your image. Up to 3 languages can be selected simultaneously for multilingual documents. Correct language selection is the most important factor for accurate recognition.
Use Grayscale for coloured or high-bit-depth BMPs
BMP supports 1-bit, 8-bit, 24-bit, and 32-bit colour depths. High-colour BMPs from scanners or design software may have coloured backgrounds that Tesseract can misinterpret. Enabling Grayscale under Image Enhancement strips colour and helps the OCR engine focus purely on text contrast.
Adjust Contrast for faded or low-contrast bitmaps
BMP files from older scanners or fax machines sometimes have uneven brightness or faded text. Try the Subtle or Strong Contrast setting to sharpen the difference between text and background before recognition. All enhancements run locally and do not modify your original file.
Wait for recognition to complete
The progress bar shows two phases: downloading the language data file (first time only — cached by your browser afterwards) and running OCR. Despite being larger in file size, BMP images are processed as quickly as other formats.
Copy or download the extracted text
The recognised text is fully editable — correct any errors directly in the text area. The confidence score shows how reliable the result is. Use Copy to copy to the clipboard, or Download .txt to save as a plain text file.
No — your BMP file is never sent to any server, even though BMP files can be several megabytes larger than compressed formats. All OCR processing runs entirely in your browser using Tesseract.js and WebAssembly; the uncompressed pixel data stays on your device and is never transmitted anywhere.
The tool supports 15 languages: English, Russian, German, French, Spanish, Portuguese, Italian, Dutch, Polish, Simplified Chinese, Japanese, Korean, Arabic, Turkish, and Ukrainian. You can select up to 3 languages simultaneously for multilingual documents or archival files with mixed-language content.
BMP stores every pixel exactly as captured with no compression — there are no blurred edges, artefacts, or dithering patterns that could interfere with text recognition. In practice, a BMP and a lossless PNG of the same image produce identical OCR results; the difference is that BMP stores data uncompressed, resulting in larger file sizes.
BMP stores raw uncompressed pixels, so there are no compression artefacts to reduce accuracy. Confidence scores for BMP files are typically similar to PNG — high for clean digital images, lower for scanned documents with uneven lighting or faded ink. If the score is below 65%, the cause is usually image quality or an incorrect language selection, not the BMP format itself.
BMP file size does not affect recognition accuracy. A 1920×1080 24-bit BMP is roughly 6 MB versus 1–2 MB for the equivalent PNG, but both produce the same OCR results for identical image content. Larger files may take marginally longer to load in the browser, but the recognition step itself is equally fast.
BMP is the native format of Windows Paint and is supported by virtually all Windows imaging software. It is also common output from older flatbed scanners, industrial machine vision systems, medical imaging equipment, and legacy document management applications that predate modern formats like PNG.
BMP and PNG provide identical OCR accuracy because both preserve image data without loss. BMP is the right choice when your workflow requires it — legacy Windows software, industrial systems, or older scanners that output BMP natively. For new workflows, PNG is preferable: same lossless quality in a fraction of the file size.
Drop a BMP image here or click to browse
BMP — first, then others · Max 10 MB
You can also paste with Ctrl+V
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