MOmodinfo·May 9, 2022Submission
Tesseract.js wraps an Emscripten port of the Tesseract OCR Engine
146 points · Open discussionnaptha
tesseract.js
JavaScript2016–2022
naptha / tesseract.js
tesseract.js
Pure Javascript OCR for more than 100 Languages 📖🎉🖥
11Distinct people
13Mentions
0Explicit recommenders
38.8KGitHub stars
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What it is
Pure Javascript OCR for more than 100 Languages 📖🎉🖥
GitHub
Where it is used
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year13 dated mentions
Observed mentions: 2016-10-02 18:58:16 UTC to 2022-05-09 09:14:49 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 7 | 2 | 5 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
13 sourcesThe total size of the download seems to be 3-4MB (based on https://github.com/naptha/tesseract.js/blob/master/docs/loca...), which is actually less than I expected.
In Tesseract.js – A Javascript port of the Tesseract OCR engineThis project is badly in need of an update. It's using an ancient 4 yo. version of tesseract.js. The current version:
https://github.com/naptha/tesseract.js
is based on tesseract v4.1.1, a newer your Ubuntu 18.04's.
The 4.0 version added new neural network system based on LSTMs, with major accuracy gains.
https://fossies.org/diffs/tesseract/4.0.0_vs_4.1.0/ChangeLog...
In In-Browser OCRThanks ! Indeed I'am using Tesseract.js [1] which wraps an WASM port of the Tesseract OCR Engine (v4). Stack is pretty simple : Vue.js, Vuetify[2] (absolutely fond of it) and Tesseract and hosted on Netlify (with Analytics [3] so no trackers).
I will probably open sourced it :)
[1] https://github.com/naptha/tesseract.js
[2] https://vuetifyjs.com/en/
[3] https://www.netlify.com/products/analytics/
In Show HN: Extract text from any pdf in the browserThey are the same people behind the javascript port of the tesseract OCR engine: https://github.com/naptha/tesseract.js
Here's an online notebook for trying it: https://observablehq.com/@tmcw/tesseract-js-v2-alpha
In Project Naptha: Make Text in Browser Images SelectableSince October there is a new version, v4: “Added a new OCR engine that uses neural network system based on LSTMs, with major accuracy gains. [..] Added trained data that includes LSTM models to 123 languages.”
No idea how well it does for structured content like tables.
There seems to be a recent v2 of a javascript port (i.e. Tesseract v4 compiled to wasm), if anyone wants to do OCR in their browser:
https://observablehq.com/@tmcw/tesseract-js-v2-alpha
https://github.com/naptha/tesseract.js
In Examples to compare OCR services: Amazon vs. Google vs. MicrosoftYep, this is completely client side :)
You can even host the external language files yourself as described in the readme: https://github.com/naptha/tesseract.js#local-installation
In Show HN: Tesseract.js – Pure JavaScript OCR for 60 LanguagesTesseract's Github Readme actually recommends upscaling for better results:
https://github.com/naptha/tesseract.js#tesseractrecognizeima...
> Note: image should be be sufficiently high resolution. Often, the same image will get much better results if you upscale it before calling recognize.
In Show HN: Tesseract.js – Pure JavaScript OCR for 60 LanguagesApache-2.0
They've added https://github.com/naptha/tesseract.js/blob/c26cae7ee956c399...
In Show HN: Tesseract.js – Pure JavaScript OCR for 60 LanguagesThanks! Fixed. The actual link is https://github.com/naptha/tesseract.js/blob/master/docs/tess...
In Show HN: Tesseract.js – Pure JavaScript OCR for 60 LanguagesLanguages list link is broken - getting 404 for the following
https://github.com/naptha/tesseract.js/blob/master/tesseract...
In Show HN: Tesseract.js – Pure JavaScript OCR for 60 LanguagesShow HN: Tesseract.js – Pure JavaScript OCR for 60 Languages
727 points · Open discussionPure JavaScript OCR for 62 Languages
6 points · Open discussion