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dropbox/lepton

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Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.

20 mentions on Hacker News by 18 people: 2 stories, 18 comments · first 2016-07-14 · latest 2026-10-07

Mentions per year 20 mentions · busiest year 2016 (9)
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  1. …JPEGs losslessly. There need to be some other factors that would lead to increased mindshare. [0]: https://github.com/dropbox/lepton And Lepton is dead.
    comment by kccqzy · 2026-10-07 · in Shipping JPEG XL in Chrome
  2. …this for reducing storage requirements, converting back on-demand so the client doesn't notice. https://github.com/dropbox/lepton
    comment by magicalhippo · 2026-09-14 · in The case against JPEG XL
  3. Kinda like what Dropbox Lepton did for JPEG back then. https://github.com/dropbox/lepton
    comment by ncruces · 2026-09-05 · in Balrogg: Demonically compacting (up to 15%) lossless Vorbis/Opus recompressor
  4. …I'm saying "so much better" I was thinking about such opportunities that benefit end users. [1] https://github.com/dropbox/lepton
    comment by lifthrasiir · 2025-04-22 · in Data Compression Nerds Hate This One Trick [video]
  5. This is why I consider JPEG XL to be the standardized successor to Dropbox's Lepton https://github.com/dropbox/lepton
    comment by compressedgas · 2024-09-21 · in Why Apple Uses JPEG XL in the iPhone 16 and What It Means for Your Photos
  6. …space. gif still isn't gone. Displacement isn't necessary for a new format to become useful. [0] https://github.com/dropbox/lepton
    comment by pgeorgi · 2023-07-20 · in JPEG XL: How it started, how it’s going
  7. …If you want there is also an open source algorithm [1] developed and used by Dropbox. [1] https://github.com/dropbox/lepton
    comment by lifthrasiir · 2022-02-25 · in Don't Use RAR
  8. …to AVIF? Kinda like Lepton[1] but just re-compressing without further loss of details. [1] https://github.com/dropbox/lepton
    comment by cheeaun · 2021-01-10 · in AVIF support enabled by default in Firefox 86
  9. Does anyone know how this compares to other projects such as Lepton? https://github.com/dropbox/lepton The goals and results appear similar. Is the primary difference that brunsli will likely actually be part of a standard (JPEG XL)?
    comment by jncraton · 2020-03-01 · in Brunsli: Practical JPEG repacker (now part of JPEG XL)
  10. …real-time video: https://snr.stanford.edu/salsify ), Lepton (distributed/parallel JPEG compression: https://github.com/dropbox/lepton ), Mosh (functional terminal emulation for mobility: https://mosh.org ), Remy (machine learning for…
    comment by keithwinstein · 2019-01-18 · in Stanford Researchers Launch Free TV Service to Improve Live Streaming Using AI
  11. To compress files for a system like Dropbox we would recommend a) check if the file can compress with https://github.com/dropbox/lepton . Lepton has some new flags that can help it compress a wider range of files, so it's not just limited…
    comment by daniel_rh · 2018-06-20 · in Show HN: DivANS – Rust simd compression algorithm demo in WASM in the browser
  12. …fully backwards compatible. [1] https://blogs.dropbox.com/tech/2016/07/lepton-image-compress... [2] https://github.com/dropbox/lepton
    comment by niftich · 2016-12-21 · in A Very WebP New Year from Cloudflare
  13. Portability notes for the Lepton implementation ( https://github.com/dropbox/lepton ): * Implemented in C++ (-std=c++0x and -std=c++11 work, -std=c++98 doesn't work). * Needs a recent g++ to compile (g++-4.8 works, g++-4.4 doesn't work). *…
    comment by ptspts · 2016-07-15 · in Lepton image compression: saving 22% losslessly from images at 15MB/s
  14. ▲ 3
    Compressing JPEGs by an average of 22%
    story by skynebula · 2016-07-15 · 1 comment
  15. I would be interested why C++ was chosen for https://github.com/dropbox/lepton instead of Rust? Given the recent usage of Rust for the implementation of Brotli compression ( https://blogs.dropbox.com/tech/2016/06/lossless-compression-... )…
    comment by nachtigall · 2016-07-15 · in Lepton image compression: saving 22% losslessly from images at 15MB/s
  16. ▲ 3
    Lepton: tool and file format for losslessly compressing JPEGs for 22%
    story by cia48621793 · 2016-07-15 · 1 comment
  17. …instructions I saw on Github a moment ago and report back...it looks like it should work though): https://github.com/dropbox/lepton/releases However I am wondering about the two different EXEs available on the page (one has an avx prefix…
    comment by orware · 2016-07-14 · in Lepton image compression: saving 22% losslessly from images at 15MB/s
  18. …on each images individually. We have a test case for training a global model in the archive (it's https://github.com/dropbox/lepton/blob/master/src/lepton/tes... ) That trains the "perfect" lepton model on the current image then uses that…
    comment by daniel_rh · 2016-07-14 · in Lepton image compression: saving 22% losslessly from images at 15MB/s
  19. https://github.com/dropbox/lepton/graphs/contributors
    comment by jamie_ca · 2016-07-14 · in Lepton image compression: saving 22% losslessly from images at 15MB/s
  20. https://github.com/dropbox/lepton/blob/master/AUTHORS
    comment by Jabbles · 2016-07-14 · in Lepton image compression: saving 22% losslessly from images at 15MB/s