Skip to content
Toolars
Explore

Audio Converter

Convert audio locally. Choose the output format and quality, preview, and download.

Local processing

Processing details

Tool inputs are processed on your device.

Resources may be downloaded to run this tool. Account services are separate.

Privacy information
Report bug

Task path / input to outcome

How to convert audio formats in your browser

  1. 01

    Choose an audio file

    Add an MP3, WAV, M4A, OGG or FLAC file up to 200 MiB. The container is verified from the file's own bytes before anything runs; anything else is refused with a clear error instead of being downgraded.

  2. 02

    Pick the output format and bitrate

    Choose MP3 (LAME) or M4A (AAC) at 96/128/192 kbps, or OGG (Opus) at 64/96/128 kbps for Compact/Balanced/High quality. WAV and FLAC ignore the bitrate setting. Channel count is preserved; the codec may adjust the sample rate.

  3. 03

    Convert and download

    Press Convert; the roughly 31 MiB engine downloads on first use and then stays cached on this device. When conversion finishes, preview the result in the built-in player, check the output size, then click Download. Output above 200 MiB is refused — pick a lossy format or a lower tier and retry. Cancel stops a running job.

Tool facts

Processing
In your browser
Input leaves this device
Never
Retention
Nothing is stored
Price
Free

Your input stays in the browser.

Audio Converter uses its verified local execution path and does not create a hidden input or output history.

Local execution

Runs inside the current browser tab.

No hidden processing

Active tool data never becomes a Toolars document record.

No account required

Use the core workflow without creating a profile. Favorites sync to your account after you sign in.

Immediate reset

Clear the tab and the active working data is gone.

What Audio Converter actually does

A musician has a 30-minute rehearsal recording in FLAC that is too large to send from a phone. She opens the audio converter, picks MP3 with the Balanced tier (128 kbps), and converts locally — the file that comes back is roughly a tenth of the size. She plays a few seconds in the preview to confirm it sounds right, then downloads it. Nothing was uploaded at any point.

Common questions

Which files are supported?
MP3, WAV, M4A, OGG and FLAC, each up to 200 MiB per file. Containers outside that list — video files, WMA, AIFF and extension renames — are refused with a clear message before the engine loads, never silently truncated.
Does my audio leave my device?
No. ffmpeg.wasm runs entirely in this browser and the file is never uploaded, logged, or shared. The engine itself (~31 MiB) is downloaded from this site on first use and cached locally for instant reuse, including offline.
Why is there a 200 MiB limit?
Browser transcoding decodes audio into raw PCM inside the engine's linear memory, so the working set is several times the compressed file size. The 200 MiB ceilings keep conversion time and memory use predictable on phones and laptops; bigger jobs belong in a desktop encoder.
How do I get a smaller file?
Compare the available bitrate tiers and listen to the result. Compact uses 96 kbps for MP3/AAC and 64 kbps for Opus; perceived quality and final size depend on the source. WAV and FLAC ignore the bitrate setting. Converting a lossy source to a lossless format does not restore discarded detail.

Keep reading

Alternatives

Related tasks, not a dead end.

Move into another focused workspace without returning to the full index.

Password Generator

Generate 8–128-character passwords from selected character sets with browser Web Crypto; every chosen set appears at least once. Copy to the clipboard or download plain text; generation runs in this tab. The same page creates or verifies Bcrypt hashes in a local Worker (cost 4–12; password limit 72 UTF-8 bytes).

Protect

List Randomizer

Enter list entries using a line break, comma, semicolon, tab or literal custom separator. Shuffle all; Draw a selection; Create groups; Remove duplicate values.

Edit

Image to Text OCR

Extract printed text from PNG or JPEG images in 13 languages — each model pack downloads on demand, recognition runs locally, and downloaded packs work offline.

Extract

Subtitle Converter

Convert plain-text subtitles between SRT and VTT and shift cue timing by whole milliseconds — up to 1 MiB and 10,000 cues per run.

Convert