Normalize audio volume online — free
Quick answer Bring quiet clips up and tame loud peaks — quick peak normalize, or true LUFS loudness matching to a streaming, podcast or broadcast target.
Raise quiet recordings or tame loud ones so the level is consistent. Peak mode is a quick fix before merging clips; LUFS mode matches true perceived loudness to a streaming or broadcast target. 15MB max (Pro: 20MB).
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Normalize audio volume online for free with VoxCraft. Level a clip with peak normalize or true loudness (LUFS) so it matches streaming and podcast targets — no account required. Peak normalize is the fast option: gain is set so the loudest sample reaches a target dBFS. LUFS mode measures perceived loudness per ITU-R BS.1770 / EBU R128 — the same standard Spotify, YouTube and podcast platforms use to decide whether to turn your upload up or down — and matches it to a target so two files with different dynamics still sound equally loud.
Unlike a simple volume slider, both modes analyze the file and calculate the right gain automatically rather than asking you to guess.
LUFS (Loudness Units relative to Full Scale) is a measure of how loud audio sounds over its whole length, not just how high its single loudest peak is. That's why two files with the same peak level can still sound very different in loudness — and why podcast apps and streaming services normalize to a LUFS target. If you're searching for a LUFS normalizer or a way to normalize audio to −16 LUFS for a podcast, pick LUFS mode and the Podcast preset.
How it works
- Upload an audio file (15MB max, 20MB with Pro).
- Choose Peak (default −3 dBFS is safe for most platforms) or LUFS mode.
- In LUFS mode, pick a preset — Streaming (−14), Podcast (−16), Broadcast (−23) — or set a custom target.
- Tap Normalize and download the result.
Who uses this
Podcast edits
Match level across takes recorded on different days or mics, or hit a platform's loudness guidance with LUFS mode.
YouTube voiceover
Avoid a quiet narration track against music beds; LUFS mode targets the −14 LUFS streaming platforms actually expect.
Before merge
Normalize each clip first so joins don't jump in loudness.
Meeting platform loudness targets
Use the Streaming, Podcast or Broadcast preset instead of guessing a peak dB value.
Tips for better results
- −3 dBFS is a safe peak-mode default for web and social uploads.
- If you're publishing to Spotify, YouTube or a podcast platform, LUFS mode with the matching preset gets you closer to their target than peak normalize ever can.
- If a file is already very loud, normalize will reduce it rather than boost into clipping.
- For a fixed boost or cut in dB, use the Adjust Volume tool instead.
Frequently asked questions
What's the difference between Peak and LUFS mode?
Peak normalize sets gain so the loudest sample hits a target dBFS — fast, but two files with different dynamics can still sound different in loudness. LUFS mode measures true perceived loudness (ITU-R BS.1770 / EBU R128) and matches it to a target, which is what streaming and podcast platforms actually check.
Which LUFS target should I use?
−14 LUFS for Spotify/YouTube/streaming, −16 LUFS is common podcast-platform guidance, −23 LUFS (EBU R128) for broadcast. Pick the preset that matches where you're publishing.
Will it clip?
No — both modes true-peak-limit before export rather than letting gain push past 0 dBFS.
How do I normalize audio to −16 LUFS?
Upload the file, choose LUFS mode, pick the Podcast (−16) preset and tap Normalize.
What is LUFS?
Loudness Units relative to Full Scale: a measure of perceived loudness over the whole file. Streaming and podcast platforms use it to level uploads.
Can it make a quiet recording louder?
Yes — normalizing raises a quiet file toward the target. If you only need a fixed boost, the volume tool is simpler.