Why this tool is useful
Prepare lighter web photographs or transparent artwork while keeping unpublished source pixels on the current device and seeing the exact resulting byte size.
Local File Tools · runs locally
Private Image to AVIF Converter
Convert a signature-verified JPEG or PNG image to modern AVIF with explicit quality and encoding-speed controls, entirely in the browser.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
The browser validates the JPEG or PNG signature, decodes it to a bounded canvas and passes its pixels to a pinned single-threaded jSquash AVIF WebAssembly encoder.
Practical example
Select a 2400 × 1600 product PNG, encode it at quality 70 with Fast effort, compare the reported source and AVIF sizes, then download the locally generated file.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.