encode — what did your encoder actually do?

  Point it at a JPEG or an AVIF and it reads the container: quantization
  tables, the scan script, component sampling factors, the av1C record. No
  pixels are decoded, which is the only reason this can run in a Worker at
  all.

    curl 'aadhar.sh/encode?url=https://example.com/photo.jpg'

  ── what it will tell you ───────────────────────────────────────────────────
  chroma      4:4:4 is a byte tax at delivery sizes; 4:2:0 is usually free
  scan        baseline vs progressive, and how many scans
  quality     estimated against the IJG Annex K table, with the deviation sho…
  depth       8-bit vs 10-bit AVIF — the latter measured ~6% smaller here, fr…
  metadata    ICC/EXIF/XMP riding along on a thumbnail

  Quality is an ESTIMATE and the frame says so. There is no quality number in
  a JPEG, only quantization tables, and every tool that prints one is
  inferring it. The method and its deviation are shown so the number can be
  argued with.

  &url= read an image