Recent Releases

1.6.020 Jul 2025 03:15 minor feature: This is a binary compatible release. API changes: Libwebp: WebPValidateDecoderConfig. Additional x86 (AVX2, SSE2), general optimizations and compression. Improvements for lossless mt` returns same results as single-threaded lossless. Miscellaneous warning, build Tool updates: Cwebp can restrict the use of `-resize` with `-resize_mode`.
1.5.031 Dec 2024 12:05 minor feature: This is a binary compatible release. API changes: - `cross_color_transform_bits` added to WebPAuxStats * minor lossless encoder speed and compression improvements * lossless encoding does not use floats anymore * additional Arm optimizations for lossy lossless + general code generation improvements * improvements to WASM performance (#643) * improvements and corrections in webp-container-spec.txt and webp-lossless-bitstream-spec.txt (#646, #355607636) * further security related hardening and increased fuzzing coverage w/fuzztest (oss-fuzz: #382816119, #70112, #70102, #69873, #69825, #69508, #69208) * miscellaneous warning, bug build fixes (#499, #562, #381372617, #381109771, #42340561, #375011696, #372109644, chromium: #334120888) Tool updates: * gif2webp: add -sharp_yuv -near_lossless * img2webp: add -exact -noexact * exit codes normalized; running an example program with no arguments will output its help and exit with an error (#42340557, #381372617)