How to add reverb to audio online
- Drop an audio file into the upload box — vocals, guitar, a full song, anything your browser can decode.
- Pick a space: Room, Hall, Plate, Cathedral or Spring.
- Fine-tune the sound with the mix, decay time, brightness and pre-delay sliders.
- Press Apply effect, compare against the original, then download MP3 or WAV.
This tool adds reverb to audio using real convolution — the same technique studio plugins use — with impulse responses synthesized for each space type. That means a tight vocal booth, a concert hall or a stone cathedral are one click apart, and every parameter from tail length to top-end damping is yours to adjust. Processing runs entirely on your device via the Web Audio API: no upload, no signup, no waiting.
Reach for it when a dry vocal take needs air, a podcast intro needs drama, a guitar riff needs vintage spring character, or a sample needs to sit in the same room as the rest of your mix. For the slowed-down aesthetic version of reverb, the Slowed + Reverb tool combines both moves at once.
FAQ
Which reverb type should I use for vocals?
Plate is the classic studio choice for vocals — dense and smooth without an obvious sense of walls. Room keeps spoken word natural, hall suits sung ballads, cathedral is for huge cinematic moments, and spring adds a vintage, slightly twangy character that fits guitars.
Does adding reverb make the file longer?
Slightly, yes. The tool renders extra time at the end equal to the decay you chose, so the reverb tail can ring out naturally instead of being chopped off at the original end of the file.
What do mix, decay, brightness and pre-delay actually change?
Mix balances the dry signal against the reverb (higher is wetter), decay sets how long the tail rings from 0.3 to 8 seconds, brightness controls how much high frequency survives in the reflections, and pre-delay (0–100 ms) leaves a small gap before the reverb starts so the original stays clear and up front.
Is this reverb tool free, and is my audio uploaded?
Yes, it is free with no account or watermark, and your file never leaves your device. The convolution reverb is computed in your browser with the Web Audio API and the result downloads as a 320 kbps MP3 or WAV.