# image/bytes Encode an image to bytes using its output format — the source format by default, or the format set by `image/jpeg` / `image/png` / `image/webp`. ## Syntax 
[image/bytes $img ?opts]
## Parameters - `$img` — an `Image` value - `$opts` — optional map; `:quality` 1–100 (jpeg/webp) and `:compression-level` 0–9 (png). Defaults come from the image's current settings; values are clamped, not errors. ## Examples 
set img [image/open "test/fixtures/images/test.jpg"]
[image/bytes $img]                                 # → jpeg bytes (source format)
set png [image/png $img]
[image/format [image/decode [image/bytes $png]]]   # → "png"
## Returns A binary-safe string of encoded bytes, or `nil` when the argument is not a live `Image` or the encoder fails. ## See Also `image/encode`, `image/write`, `image/base64`, `image/format`
← image/base64
image/crop →