Online OCR Free – Batch OCR UI for Tesseract, Gemini and OpenRouter
Built this because people working with large document sets had no free tool that handled batch processing cleanly. Tesseract is free and runs locally. For anything that needs more accuracy — Google Vision, Gemini, or any OpenRouter model — you bring your own API key. No subscription, no markup on your usage. Export as TXT, JSON, XML or PDF. AI engines support custom prompts so you can translate, extract form fields, or get structured output in one step. App: https://onlineocrfree.qzz.io Source: https://github.com/naimurhasan/online-ocr-free
Online OCR Free – Batch OCR UI for Tesseract, Gemini and OpenRouter launched on March 3, 2026 with 14 votes, #999 of 23,380 launches that month and more than 90% of that year's launches.
In plain words
Online OCR Free is a batch document processing tool that converts images to text using either free local Tesseract or premium AI engines like Gemini and Google Vision by bringing your own API keys. It exports results as TXT, JSON, XML, or PDF and supports custom prompts for translation, form field extraction, and structured output. Designed for users processing large document sets who need free or pay-as-you-go options without subscriptions.
written from the facts on this page · September 2026
From the sources
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Tesseract.js – Pure JavaScript OCR for 60 Languages2016 · github.com · ▲727Pure Javascript OCR for more than 100 Languages 📖🎉🖥 - naptha/tesseract.js
OCR Arena – A playground for OCR modelsNov 2025 · ocrarena.ai · ▲216I built OCR Arena as a free playground for the community to compare leading foundation VLMs and open-source OCR models side-by-side. Upload any doc, measure accuracy, and (optionally) vote for the models on a public leaderboard. It currently has Gemini 3, dots.ocr, DeepSeek, GPT5, olmOCR 2, Qwen, and a few others. If there's any others you'd like included, let me know!
tesserocr – A Python wrapper for the tesseract-ocr API2016 · github.com · ▲78A Python wrapper for the tesseract-ocr API. Contribute to sirfz/tesserocr development by creating an account on GitHub.
LLM-aided OCR – Correcting Tesseract OCR errors with LLMs2024 · github.com · ▲479Almost exactly 1 year ago, I submitted something to HN about using Llama2 (which had just come out) to improve the output of Tesseract OCR by correcting obvious OCR errors [0]. That was exciting at the time because OpenAI's API calls were still quite expensive for GPT4, and the cost of running it on a book-length PDF would just be prohibitive. In contrast, you could run Llama2 locally on a machine with just a CPU, and it would be extremely slow, but "free" if you had a spare machine lying around. Well, it's amazing how things have changed since then. Not only have models gotten a lot better,…
Gogosseract, a Go Lib for CGo-Free Tesseract OCR via Wazero2023 · github.com · ▲120Tesseract is one of the largest Open Source OCR (Optical Character Recognition) projects. There is already a Go library for using Tesseract from Go with CGo, called Gosseract. However if you are interested in OCR from Go without C complicating building and cross-compiling, there aren't any other options. Wazero is a Go WASM runtime that doesn't have any CGo dependencies. With Emscripten Tesseract has been compiled to WASM and ran within Wazero. Gogosseract provides a simple API on top of this. This project has been an interesting delve into the world of WASM.

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