Will resizing reduce AVIF image quality?

Downscaling preserves quality very well — you are discarding pixels you would not have rendered anyway, and AVIF's encoder is efficient at smaller sizes. Upscaling has to invent pixels by interpolation and softens the result; for upscales beyond 2× a dedicated AI upscaler does better than this tool. For any downscale and modest upscale (up to 2×), standard resampling produces clean results.

Will transparency and HDR be preserved?

Yes. AVIF supports a full alpha channel and 10/12-bit HDR — both pass through resize. Wide-gamut color (BT.2020, Display P3) and HDR metadata (PQ / HLG) are preserved when present in the source. The alpha channel resamples alongside the color channels so logos and PNG-style transparent assets stay clean.

Should I use lossless or lossy AVIF?

Lossless for graphics, screenshots, line art, and logos — perfect quality, frequently smaller than PNG. Lossy for photographs at quality 70-85 — typically 30-50% smaller than equivalent WebP and visually indistinguishable from the source. AVIF's lossy mode holds up better than JPG and WebP at very low bitrates, so quality 50-60 is still usable for non-critical thumbnails.

Can I resize animated AVIFs?

Yes — animated AVIFs resize frame-by-frame, with the same dimensions applied to every frame. The output stays an animated AVIF. If the source is a still image saved with the .avif extension, it processes in one pass.

Will the file size shrink in proportion to the dimension change?

Roughly, but not exactly. Halving width × height = 1/4 the pixel area, which usually translates to 70-80% smaller file. Halving only one dimension cuts pixel count in half and file size by ~40-60%. Cropping is more aggressive than resizing for shrinking — see Crop AVIF.

My viewer or editor cannot open AVIF — should I resize before converting?

Resize and convert in a single step. AVIF to JPG and AVIF to PNG both let you set output dimensions on the way out. Combining is more efficient than resize-then-convert, since the conversion step has to re-encode anyway. AVIF support landed in Chrome 85, Firefox 93, and Safari 16.4 — older browsers and many native apps still need the JPG fallback.

Can I batch resize many AVIFs to the same size?

Yes — drop in entire folders. Same target dimensions apply to all files. Each file processes in parallel withon our servers and downloads individually or as a ZIP. Useful for regenerating a website's AVIF library at a new responsive breakpoint or building a srcset ladder from a master image.

What DPI should I pick?

For screen / web: 72 or 96 DPI. For draft inkjet prints: 150 DPI. For high-quality offset printing: 300 DPI. For fine-art prints: 600+ DPI. DPI is metadata that tells the receiving software how big the image should print — it does not change pixel dimensions. To actually change resolution, use the width × height fields.

Resize AVIF

Resize AVIF images by pixels or percentage. AVIF is the most efficient web format — resizing to display dimensions saves additional bandwidth. Aspect ratio lock prevents distortion.

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