Sped Up Audio Maker

Two ways to speed a song up

A sped up version can mean two quite different sounds, and this tool makes both. By default the Keep the original pitch switch is off, which gives the sound most people recognize from short videos: the music plays faster and everything rises, so a singer sounds higher and a little more excited. Turn the switch on and the tool stretches time instead, so the tempo rises but the voice stays at its natural pitch.

Which one you want depends on the job. For a remix-style clip or a joke edit, the rising voice is part of the charm. For a lecture, an audiobook chapter or a rehearsal track, you almost certainly want the natural voice, because higher pitch makes speech harder to follow and tiring to hear. Switching between them takes one tap, and since the preview updates within a moment, you can compare them on the same passage.

The page works with audio files you already own or have permission to use. It has no link field and cannot take audio from streaming apps; use a file you already have.

Sped up, in numbers: how much shorter and how much higher

The table in the Numbers tab shows what each speed does to a three-minute song. Speed divides the length: at 1.25x the song lasts 2:24 and you save 36 seconds, at 1.5x it lasts exactly 2:00, and at 2x it lasts 1:30. If you only care about getting through a recording faster, those savings add up. A one-hour talk at 1.5x takes 40 minutes.

With the switch off, the pitch rises by 12 times the base-2 logarithm of the speed. That gives about 0.84 semitones at 1.05x, 1.96 at 1.12x, 3.86 at 1.25x, 7.02 at 1.5x and a full 12 at 2x, which is one octave. A rise of one or two semitones is a gentle shift; four is clearly audible; beyond seven the voice is far from natural.

With the switch on, the right-hand column of that table reads unchanged: speech keeps its normal pitch, and only the time axis is compressed. The trade-off is a slight warble on sustained notes at extreme settings. Under about 1.5x it is usually hard to notice.

Using the presets: 1.15x, 1.25x, 1.35x and 1.5x

The four presets mark useful steps rather than magic numbers. 1.15x is a light lift, good when a song feels slightly lazy or when you want a short clip to fit a time limit by a few seconds. 1.25x is the usual default for a lively edit: a mid-tempo song at 100 beats per minute becomes 125 and the whole thing feels brisk without losing shape.

1.35x adds real urgency. Vocals begin to blur at this level if the switch is off, so it works best for instrumentals, game music and dance tracks. 1.5x is the upper end of what most songs tolerate; use it for a montage, a workout burst or a punchy intro. The knob turns all the way to 2x for spoken material and special effects, but music at double speed becomes a novelty.

Presets only set the knob position. Afterward you can drag the knob to any value in between, such as 1.18x or 1.42x. A useful check is to listen to the busiest verse rather than the intro: if the words and the drum pattern still read clearly there, the speed is safe for the whole track. Copy settings link stores the choice in the address bar if you want to reuse it next time.

If you are unsure where to begin, play a favorite verse at 1.25x with the pitch switch off, then on, and pick the one that matches the mood you want. The pitch-locked version sounds like the same performer speaking faster; the pitch-free one sounds more excited. Your ear is the final judge.

Pitch rising or pitch locked: how to choose

With the pitch switch off, the voice and the tempo rise together. The nightcore page adds treble and bass controls for a more stylized version of that sound; use this page for a plain, neutral speed increase, with or without the pitch change.

A fast way to decide: if the edit should feel like the same performer talking quickly, switch the pitch lock on. If it should feel like a playful cartoon or a sped-up tape, leave it off. Neither is more correct; they answer different questions, and having both modes on one page saves a trip between tools.

When you need a speed outside 1.05x to 2x, or want to slow something down as well, the audio speed changer covers 0.25x to 4x.

Why music sometimes sounds sped up by itself

Plenty of visitors arrive because a song they are playing sounds too fast and they want to know why. The usual cause is a mismatch in sample rate: a file recorded at 44.1 kHz but played by something that assumes 48 kHz runs about 9 percent fast and rises by roughly a semitone and a half. Some video editors and apps trigger this when the project settings differ from the audio.

Other causes are simpler. A music player may have a playback speed setting left at 1.25x from a podcast session. A Bluetooth headset can fall back to a low-quality call mode that sounds thin. A video that was converted from 24 to 25 frames per second also plays about 4 percent faster, and the audio follows.

If a file you own really is running fast, you can fix it here by setting a speed below 1.0 in the audio speed changer, which covers slow values. Compare against a known-good copy to choose the right ratio: 0.92x undoes the 48 kHz versus 44.1 kHz mismatch, and 0.96x undoes the 24 to 25 frames per second change.

Speeding up audio for video, phones and TikTok-style clips

Short-form editors usually let you attach a music file, so the practical route is to process the track here first and then add it to the clip. Make the sped up version, save it as MP3, and import it like any other song. Keeping the length in mind helps: a 15-second window at 1.25x holds 18.75 seconds of the original. For a clip you shot yourself, the page also opens the sound of most MP4, MOV and WebM videos; the sped-up result is saved as audio, not as a new video.

This page does not pull audio out of apps or sites, and it cannot grab the sound from a clip you saw online. If you want to use a track in a video, start with a file you made, bought a download of, or have a licence for, and check the rules of the platform where you post.

On phones the page should work in the browser that comes with the phone. Choose the file from your Files app or the music you saved, wait for the waveform, and use the same controls. Long files take longer on older phones because the work is done locally, so trim a clip first if you only need a section.

Is it sped up or speeded up?

Both forms exist. In American English the standard past tense and participle of speed up is sped up, as in the song was sped up for the video. Speeded up appears in older writing and in British usage, and no one will misunderstand it, but sped up is the one you will see in titles, captions and search results.

The related noun is speedup, and the verb phrase is two words: speed up. A tool that makes faster audio is a speed-up tool, and the audio it produces is sped up.

Formats, size and where processing happens

Most common audio files open here (FLAC, Ogg, Opus, AAC, M4A, WAV and MP3), as do other types the browser understands, up to 250 MB. When you save, the choices are MP3 (128, 192, 256 or 320 kbps) or WAV (16-bit or 24-bit), with an estimated size displayed first. A faster edit is shorter, so the file shrinks in proportion to the speed. The note under the drop zone says the same thing in one line: audio files you have work, links from streaming sites cannot be opened.

Decoding, stretching and encoding all take place in the tab, which means the audio stays on your machine. The page forgets the working copy when you close it; the last file you opened stays in your browser on this device so other tools can offer to continue with it, and clearing the site data removes it. The links under the player forward the finished audio to a follow-up tool using storage inside the browser.