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Lofi Converter

Give any track the lofi treatment — muffled warmth, tape wobble, vinyl crackle and gentle saturation. Tune each one, preview it, download the WAV.

Drop audio here

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MP3, WAV, FLAC, OGG, M4A · under 25 MB works best

What is a lofi converter?

A lofi converter takes a clean recording and degrades it on purpose, recreating the sound of music played back on imperfect media — a worn cassette, a dusty record, an old radio. The aesthetic that powers study playlists and chill streams is built on exactly four ingredients: narrowed bandwidth, slight pitch instability, tape-style saturation, and surface noise.

Each ingredient maps to a physical cause. The muffled warmth is what happens when a playback system can't reproduce high frequencies; the wobble is wow and flutter, the speed variations of tape transports and off-centre records; the crackle is dust in a vinyl groove; the saturation is magnetic tape rounding off peaks it can't store.

This converter exposes each ingredient as its own control with presets to start from, renders the result in your browser with the Web Audio API, and gives you a WAV to download. Nothing is uploaded — the processing happens on your own machine.

Lofi converter features

Four real controls

Warmth, wow & flutter, crackle and saturation — the four treatments that actually make audio read as lofi, each on its own slider with sensible ranges.

Presets that match media

Classic Lofi, Cassette, Vinyl and Old Radio start you from a known sound; the Custom preset appears the moment you move a slider.

Preview before you download

Render, listen, adjust, render again. The preview always plays the last render, so what you hear is exactly what you'll download.

WAV export

The download is an uncompressed WAV rendered on your machine — no re-encode loss stacked on top of the intentional degradation.

100% in your browser

Decoding, processing and rendering all run locally with the Web Audio API. Your track never leaves your device.

Pairs with Slowed & Reverb

Lofi is degradation; slowed & reverb is speed and space. Run a track through both for the full nostalgic edit.

Who makes lofi versions

Study and chill playlist makers

The whole aesthetic is built on degraded, warm-sounding audio. Running your own tracks through the same treatment is what makes a playlist sound like it belongs together.

Video editors needing background music

A full-range track fights a voiceover for the same frequencies. Rolling off the highs and lows is exactly what makes music sit behind speech instead of competing with it.

Producers auditioning a vibe

Before committing to a lofi arrangement, hearing your own demo through tape wobble and a lowpass tells you in seconds whether the idea suits the treatment.

Anyone making a nostalgic edit

Wow and flutter plus crackle is the sound of a cassette or a worn record. It's shorthand for memory, which is why it shows up on so much montage and mood content.

What makes audio sound lofi

1. Bandwidth gets narrowed
A lowpass filter removes the sparkle up top and a highpass thins the sub. Old media couldn't reproduce the extremes, so losing them is what reads as 'played back on something else'.
2. Pitch drifts slightly
Wow and flutter are the slow and fast speed variations of tape and vinyl. Two detuning LFOs at different rates recreate it, so the drift never settles into an obvious cycle.
3. Saturation and surface noise
A soft-clip curve rounds off peaks the way tape does, adding harmonics rather than distortion. Sparse filtered noise bursts on top read as dust and crackle.

Lofi converter FAQ

How do I make a song sound lofi?

Upload it and start from a preset. The four controls are the ones that actually matter: warmth sets how much high end is removed, wobble sets the pitch drift, crackle adds surface noise, and saturation rounds off the peaks. Adjust, hit apply, preview, then download.

What do wow and flutter actually mean?

They're the two speeds of pitch instability in tape and vinyl playback. Wow is the slow drift, under about 4 Hz, from an off-centre record or an uneven capstan. Flutter is faster and finer. Here they're combined into one wobble control driving two detuning oscillators at different rates.

Is the audio uploaded to a server?

No. Decoding and processing both run in your browser with the Web Audio API. The file is read from your device, rendered locally, and the WAV you download is produced on your machine. Nothing is transmitted.

Why does the output sound quieter than the original?

Saturation raises the level, so the render trims the output to compensate and stay clear of clipping. If you want it louder, normalise or limit it afterwards — that's a mastering step rather than a lofi one.

What's the difference between this and slowed and reverb?

Different treatments that often get combined. Slowed and reverb changes playback speed and adds a reverb tail. Lofi is about degradation — bandwidth, pitch instability, saturation, noise. Run a track through Slowed & Reverb first and then through this for the full effect.

How long a track can I process?

The first five minutes are rendered, which covers almost any single track. Longer files are truncated rather than refused. Rendering happens in one pass on your own machine, so speed depends on your device.