Files stay on your device. Enter send · Esc close drawers
GIF first frame as static PNG
Image formats trade off compression, transparency, animation, and browser support. Convert GIF → PNG (first frame) converts your input to PNG, which is the right choice when you need lossless compression with transparency support (icons, screenshots, logos). Static GIFs are 8-bit indexed (256 colours max) — converting to PNG only helps if you also re-render from a higher-bit-depth source. For animated GIFs, PNG can't carry the animation; use APNG or WebP instead. The preset outputs PNG (first frame) entirely in your browser — the file is never uploaded to a conversion server, which matters when the source contains personal information like ID scans, screenshots of private documents, or proprietary design files.
| Output format | PNG |
|---|---|
| Processing | 100% in your browser — no upload |
| Cost | Free, unlimited |
This preset is a deterministic recipe — every step has fixed parameters so the result is byte-identical across runs of the same input.
The format conversion runs through canvas APIs and a WebAssembly image-encoder. Decode and re-encode happen in your browser; the source file is never uploaded.
For input formats not natively decoded by the browser (HEIC, AVIF on older browsers, TIFF), Mochi falls back to a WebAssembly decoder shipped alongside the page.
PNG preserves hard edges and transparency that JPEG would smear. Icons, logos, and screenshots compress better as PNG when the image isn't photographic.
Static PNG is usually larger than GIF for indexed images, but supports full 24-bit colour. The actual ratio depends on image content — photographs follow the average closely, while screenshots and line art compress differently.
No. This preset runs entirely in your browser using WebAssembly + canvas APIs — no server round-trip. You can verify this in your browser's network panel: only static asset requests, no image upload. The file never leaves your device.