Live now
Images
Convert to PNG, JPEG, WebP, BMP, or a multi-size ICO favicon (AVIF too, in browsers that support encoding it), with quality control and optional resizing. Reads PNG, JPEG, WebP, GIF, BMP, SVG and AVIF. Batch-convert many at once.
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Audio
Convert MP3, M4A/AAC, OGG, FLAC, WAV and anything else your browser can decode into a standard WAV file, with optional mono downmixing and resampling — via the browser's built-in Web Audio API.
Live now
Documents
Combine one or more images into a single PDF (one image per page). Convert between JSON and CSV, with proper handling of quoted fields, commas and embedded newlines.
Later
Video
MP4, WebM, GIF export and trimming. Video is the heaviest to do reliably in-browser, so it's the last piece — needs a large in-browser codec that's still being evaluated for size and speed.
01Notes on the image converter
PNG and WebP keep transparency; JPEG and BMP flatten transparent
areas to white (classic BMP transparency support is unreliable
enough that we don't rely on it). Animated GIFs convert their
first frame only. Quality only applies to the lossy formats (JPEG,
WebP, AVIF). ICO output builds a standard multi-resolution favicon
(16×16, 32×32, 48×48) from your source image,
stretching a non-square source to fit each square size rather than
cropping it — for best results, start from a square image. AVIF
output only appears if your specific browser can actually encode
it — support is inconsistent, so we feature-detect it rather
than offer something that would silently fail.
Not supported, and why: HEIC/HEIF and RAW camera
formats (CR2, NEF, ARW, DNG…) aren't decodable by any
browser without a large external library, so we don't fake support
for them. SVG conversion only works one direction (SVG →
raster) — going the other way is image tracing/vectorization,
a fundamentally different (and lossy) problem, not format encoding.
02Notes on the audio converter
Output is always 16-bit PCM WAV — a lossless, universally supported
format, and the only one browsers can reliably write without adding a
large encoder library. Input format support depends on your browser's
codecs (all major browsers handle MP3, AAC/M4A and WAV; OGG and FLAC
support varies).