Convert MP3 to MPEG

You choose it, because audio alone has no picture. The default is a static waveform render, and you can supply a still image instead — cover art, a title card, a photo — which is held for the whole duration. That is what makes the file uploadable to video-only platforms that will not accept a bare audio track. MP3 is MPEG-1 Audio Layer III, finalised in 1993, and still the most universally decodable audio format that exists. MPEG program streams are decoded by literally every DVD player, set-top box and broadcast chain ever built, and they tolerate bit errors gracefully.

Only if it has to be. Where the MPEG container accepts the source audio codec directly, the stream is copied in untouched and stays bit-identical. Where it does not, the audio is transcoded once to whatever MPEG does accept, at a bitrate matched to the source so the second pass costs as little as possible. MP3 is lossy: a psychoacoustic model discards frequencies the ear is unlikely to notice, typically at 128 to 320 kbps. The video is MPEG-1 or MPEG-2 with MP2 or AC-3 audio, multiplexed into a stream designed to be decoded by fixed-function hardware.

Barely larger, if you use the default still image. A single held frame compresses to almost nothing across the whole duration because every frame is identical to the last, so the file is dominated by the audio track. Choosing an animated waveform instead adds real video data and can double or triple the result.

Partially. Title and artist map onto the video container’s own metadata fields, and embedded cover art is a natural fit for the still image the video displays. Everything else — track number, album, year, genre — has no equivalent slot in a video file and is dropped rather than approximated.

Yes — basic MP3 → MPEG conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.

Free accounts: up to 100 MB per MP3 file. Premium: typically 1 GB per file, depending on the MP3 source type. Very large files are split into chunks server-side when the MPEG format allows.

Conversion preserves all information that both MP3 and MPEG can represent. Format-specific features that the MPEG format doesn't support (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — see the format-specific notes on the result page.

Yes — drop multiple MP3 files into the upload zone and they are queued in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.

Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end.

Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses standard `<input type="file">` upload — no WebAssembly or PWA dependencies — so even older browsers work.

Yes — uploaded MP3 files are processed in isolated workers and deleted within minutes. We never view, retain, or share content. See /privacy/ for the data-retention window.