How to slow down a song online (free, no software)

The steps at a glance

1. Import the file. Open the converter and load your MP3 or WAV from your device.
2. Set the speed. Drop it to 0.90× to start. That is the most-used setting: audible without distorting the track.
3. Listen before exporting. Play the preview and check the sung passages — they reveal excessive slowing first.
4. Adjust if needed. If the effect is too subtle, go to 0.88×. If it drags, come back up to 0.93×.
5. Export. MP3 320 kbps to listen, WAV if you plan to rework the file afterwards.

The short answer

Slowing a song means reducing its playback speed. In an online tool you load the file, pull the speed slider to around 0.90×, and export. It takes under a minute and needs no installation.

The only real decision is about the voice: do you want it to drop into the lower register along with the tempo, or keep its natural pitch? Both are possible and they give very different results.

Which percentage to pick

Speed is expressed as a multiplier: 0.90× means 10 % slower than the original. Here is what each range does.

Below 0.80×, drum attacks go soft and sustained vocals start revealing digital artefacts. Unless you are chasing an extreme effect, stay above it.

With or without changing the voice?

This is what separates the two families of result.

If pitch drops with the tempo, the voice gets deeper and thicker. That is what a slowed-down vinyl does, and it produces the "screwed" sound of southern rap. The effect is instantly recognisable, but it transforms the timbre deeply.

If pitch is preserved, only the tempo changes: the voice keeps exactly its original colour, just slower. That is what most people actually want — learning a song, working on a passage, or making a calmer version without distorting the vocal.

If you are unsure, keep the pitch. It is the more forgiving setting.

Adding reverb, or not

Many people looking to slow a song actually want the full slowed and reverb effect: the slowdown plus reverberation that creates a sense of space. If that is you, add 12 to 18 % reverb after setting the speed. Our slowed and reverb tutorial walks through it.

If you just want a slower version — to work out a solo, follow lyrics, or dance more slowly — skip the reverb entirely: it would blur exactly what you are trying to hear more clearly.

Common mistakes

Slowing too much on the first try. Ears adapt fast. A setting that feels timid after thirty seconds is often the right one. Always compare against the original before committing.

Forgetting to compensate the bass. Slowing pushes low-end energy downward. The track can sound hollow on a small speaker. A light bass boost of 8 to 12 % restores the balance.

Exporting to MP3 when you will rework it. If the file goes into a video edit or a second round of processing, export WAV. Every MP3 pass degrades the sound a little more, and the losses stack.

Common use cases

Learning a song on guitar or piano. Slow to 0.75×–0.85× with pitch preserved: the notes stay in tune, you simply get time to follow them. This is the one case where going below 0.80× is fully justified.

Making a mood version for a video. 0.90× with 15 % reverb gives the expected result on short-form platforms.

Following lyrics in a foreign language. 0.85× with pitch preserved makes consonants far more distinct.

What about rights?

Slowing a track does not create a new work legally: it is a derivative work, subject to the rights of the original recording. Private use needs no permission. To publish the result, you need rights to the source track, a Creative Commons licence, or the artist's agreement.

Frequently asked questions