Kiln – a fast, native batch image processor
Beats XnConvert benchmarks with a custom C++ pipeline and zero telemetry.

Node-based image filtering running entirely locally in the browser.
Designers and photographers needing local, privacy-focused batch editing
Photopea · Figma · GIMP
Beats XnConvert benchmarks with a custom C++ pipeline and zero telemetry.
The repo delivers the two UX pieces you actually need: a visual rule builder plus a raw SIEVE editor and an IMAP connection dialog for direct uploads. It’s pragmatic — cross-compile notes, native build deps, and a tuned release profile (strip, LTO, size opt) show the author cared about distribution and binary size — but it’s solving a narrow, well-known problem rather than inventing one.
DuckDB-inspired embedded pipelines for JVM when Flink is overkill.
Multi-pass review workflow with XMP-to-Hald CLUT profile conversion.
Batch processing is the differentiator, but Descript and VEED already solve the core editing well.
GeoServer replacement without the ops burden, but GIS already has mature solutions.