dropbox/lepton
Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%. observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 8
- Longevity 100
Flags: archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3703
- days_rel: n/a
- days_push: 912
- n_releases_24m: 0
Adoption not part of the score
4996 stars · 347 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Lepton is a command-line tool and file format from Dropbox that losslessly compresses JPEG files by an average of 22% while allowing exact reconstruction. It is written in C++ and supports pipes, batch processing, and configurable memory limits.
Use cases
- compress jpeg files losslessly
- archive large photo collections to save disk space
- reduce image bandwidth when serving jpegs
- roundtrip compress and decompress jpg files
- compress jpegs via unix pipes in a pipeline
When to choose
- you need bit-exact JPEG compression savings for archival storage
- you want to serve original JPEGs with ~22% bandwidth reduction
- you need a proven C++ tool with pipe support for image pipelines
When to avoid
- starting a new project - the repo is deprecated and archived with unfixed security issues
- you can adopt modern formats like WebP or JPEG XL instead
- you need active maintenance and timely vulnerability fixes
- consider Microsoft's Rust implementation of Lepton instead
Facets
cli-tool · maturity abandoned
compression image-processing files image-processing developer-tools windows cli cross-platform jpeg lossless-compression cpp deprecated archived linux macos
2 sources
- readme: https://github.com/dropbox/lepton · fetched 2026-08-28 · 89334bee6478
- homepage: https://blogs.dropbox.com/tech/2016/07/lepton-image-compression-saving-22-losslessly-from-images-at-15mbs/ · fetched 2026-08-29 · 3c57aac981ee
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| dropbox/lepton | main | 10 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem