Is the MP3 to OGG converter free?

Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.

Are my files uploaded to a server?

No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your MP3 file never leaves the browser tab.

What quality is the OGG output?

OGG — Vorbis by default; use the quality control to trade file size for fidelity.

How do I convert MP3 to OGG?

Drop your MP3 file above (or click Browse) — the output is already preset to OGG — then click Convert and download the result.

MP3 → OGG · On-device · No upload

Convert MP3 to OGG

Convert MP3 to OGG in seconds, free and entirely in your browser. MP3 is the universally supported lossy audio format; OGG wraps open Vorbis audio. Transcodr runs real ffmpeg compiled to WebAssembly, so your file is processed on your own device and never uploaded.

Drop files to convert

Video, audio, images, subtitles: anything ffmpeg can read. Drop them anywhere on the page or browse from disk.

Try a sample:

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Time	From		To	Size	Δ	Duration
When you convert something, it’ll appear here. Clears on tab close — we don’t keep records.

MP3 vs OGG

Property	MP3	OGG
Compression	Lossy	Lossy (Vorbis)
Fidelity	192 kbps default	Good
File size	Small	Small

MP3 → OGG questions

Is the MP3 to OGG converter free?: Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.
Are my files uploaded to a server?: No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your MP3 file never leaves the browser tab.
What quality is the OGG output?: OGG — Vorbis by default; use the quality control to trade file size for fidelity.
How do I convert MP3 to OGG?: Drop your MP3 file above (or click Browse) — the output is already preset to OGG — then click Convert and download the result.

01 / Engine

Real ffmpeg, compiled to WebAssembly.

Same library Netflix, YouTube, and basically every command-line video tool relies on, running in a Web Worker. Pipe a file in, run a command, pipe bytes back out.

02 / Privacy

Nothing leaves the tab.

No uploads, no accounts, no telemetry beyond an anonymous pageview. We couldn’t see your files if we wanted to — there’s no server in the loop.

03 / Limits

It is, after all, a tab.

Files up to a few hundred megabytes convert comfortably. Beyond that, your browser starts asking pointed questions. Use the desktop ffmpeg for 4K masters.

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