Loudness Normalizer

Make quiet and loud sections feel more consistent, with ready-made settings for streaming, podcasts and broadcast.

How it works

Choose a file, keep the defaults or adjust the options, then click the main button. The finished file downloads automatically when it is ready.

1
Choose your file
Upload the video, audio or GIF from your device. Its name and preview appear immediately so you can confirm the selection.
2
Adjust if you need to
The defaults are ready to use. Change any visible format, quality or size options only when you want a different result.
3
Click the action button
Click Convert, Compress, Normalise or Make GIF. The finished file downloads automatically when it is ready.

What you get

Simple tools, clear results, no unnecessary steps

Volume that feels consistent

Balance the whole track by how loud it feels to a listener, not just by its single loudest moment.

Targets that mean something

Choose a ready-made preset for streaming, podcasts or broadcast instead of guessing at technical loudness values.

A finished, ready-to-use file

Download the complete converted file in the format you chose, with no preview-only result or watermark.

Nothing to install

Open the tool on a phone or computer and get started. No app or extension is required.

Free to use

Conversion is free with a signed-in Spira account. There is no per-file charge and no length ceiling hidden behind a paywall.

Why consistent loudness matters

Streaming services adjust playback volume so one track does not suddenly sound much louder than the next. Choosing the right preset helps your audio keep the balance and impact you intended, without forcing listeners to reach for the volume control.

What loudness balancing cannot fix

Loudness balancing does not remove room echo, background noise or microphone distortion. Clean up the recording first, then use this tool as the final step to make the finished audio play at a consistent level.

FAQ

What is the difference between LUFS and peak normalisation?

Peak normalisation only watches the loudest instant. LUFS reflects how loud the whole track feels to a listener, which makes it more useful for keeping music, speech and episodes consistent.

Which target should I use?

Use the streaming preset for platforms such as Spotify or YouTube, the podcast preset for spoken episodes, and a broadcast preset when a delivery specification requires it.

Will it clip?

No. The tool leaves safe headroom while balancing loudness, helping prevent clipping or harsh distortion after the file is uploaded.

Can it make a quiet recording sound better?

It will make it the right level, not better. Raising a quiet recording raises its hiss and room noise by the same amount. Normalisation is a finishing step, not a repair.

The conversion is the small end of it

Spira AI takes a script or a link and produces a finished short with voiceover, visuals and captions, then publishes it on a schedule. These tools are the bits you reach for along the way.