Image to Text (OCR)
Extract text from images directly in your browser. Supports English, Vietnamese, Chinese, Japanese, and Korean. Powered by Tesseract.js — runs locally, no upload.
About this Image to Text (OCR) tool
CheckHub runs Tesseract.js entirely inside your browser to convert images into editable text. Your image never leaves your device — language data is fetched from CDN only on first use.
How to use the Image to Text (OCR)
- Step 1. Pick one or more languages that match the text in your image.
- Step 2. Drop, paste, or upload an image (PNG, JPG, WEBP, BMP, GIF).
- Step 3. Click Extract text and wait for the OCR engine to finish.
- Step 4. Copy the result or refine by reuploading a clearer image.
Frequently asked questions
- Is my image uploaded to a server?
- No. Tesseract.js runs locally in your browser using WebAssembly. Only the language data files are downloaded from a public CDN.
- Why is the first run slow?
- On first run the engine and the chosen language data (a few MB per language) are downloaded once and cached by the browser. Subsequent runs are much faster.
- Which languages work best?
- Tesseract handles printed Latin scripts (English, Vietnamese) very well. Chinese, Japanese, and Korean work but accuracy depends heavily on image quality and font.
- How can I improve accuracy?
- Use a high-resolution image, ensure good contrast between text and background, and crop to just the text area before uploading.
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