Free online · No sign-up · Count or target duration
Use this free audio looper online to repeat a whole local file or a marked A–B range by count or exact duration, preview the seam, add an optional linear crossfade, and download 16-bit PCM WAV. No sign-up or audio upload is required.
Audio looper workspace
Choose a range · Set the length · Create WAV
Files stay local
Repeat a whole track or an optional A–B range, preview one join, and download WAV. MP3, WAV, FLAC, M4A, AAC, or OGG up to 80 MB.
Three local steps
Choose a file or A–B range in the audio looper online, set the length, and preview the join before export.
Choose an MP3, WAV, FLAC, M4A, AAC, or OGG file up to 80 MB. The audio looper online decodes it in this tab, rejects empty, oversized, unsupported, or undecodable input, and keeps the original samples in memory while you pick a source range.
Whole track is the default source. Mark A and B at least 0.25 seconds apart and that range automatically becomes the source. Count accepts 2–20 copies. Use exact duration only when you need a clock length. The audio looper online shows the current source, output duration, and estimated WAV size before any full render.
Preview seam renders only a short window around one join so you can hear a click before allocating the whole output. Create WAV starts the full render after you click. The audio looper online immediately drops an older download when the source, A–B range, count, target duration, or crossfade changes.
What the tool shows and controls
The audio looper online shows source, duration, and WAV size. Open exact duration or smoothing only when needed.
The audio looper online defaults to the complete decoded file. When a valid A–B range exists, that fragment automatically becomes the output source; clearing the range restores the whole track. Transport still plays the original so you can move A and B. This is a file-generation task, not a live Loop Station and not a reverse of the same markers.
Count mode writes 2–20 copies. If Crossfade is on, the displayed length is the shorter overlapped result. Target duration keeps the length you typed by taking exact frames at the decoded sample rate, including a partial final copy when needed. The audio looper online fails before render if the target is shorter than the source range.
Seams are None or Crossfade. Crossfade defaults to 0.05 seconds, can move from 0 to 2 seconds, and must stay strictly shorter than half the source. Complementary linear weights mix the overlap so the join cannot rise above the louder incoming sample. The audio looper online does not search for zero crossings or musical downbeats.
Preview seam appears after a file produces a loop plan. Invalid duration or smoothing settings disable it and show the recovery reason beside the controls. A successful preview allocates only the join window. The audio looper online writes 16-bit PCM WAV at the decoded sample rate and channel count only after Create WAV, then revokes that download if the plan changes.
Practical workflows
Use the audio looper online when another player or editor needs a longer file.
Mark a riff, lick, or spoken line, set count to a number you can play against, and preview the join. If the start and end do not meet, move A or B or add a short crossfade. The audio looper online gives you a WAV to loop in a player, not a metronome, MIDI click, or auto-detected barline.
When an editor asks for 45 seconds of the same two-bar pad, use target duration so the file length is exact. Read the estimated WAV size first. The audio looper online will refuse a plan that exceeds the 384 MiB peak of original PCM, output PCM, and WAV, or the 4 GiB RIFF limit, instead of failing after a long render.
Room tone, rain, or a synth drone often needs many repeats. Start with None. If a periodic click appears, try 0.05 seconds of crossfade, then a slightly longer fade, then a different A–B point. The audio looper online does not claim a seamless audio loop maker result when the waveform still jumps.
Use Audio Reverser when the marked range should run backwards inside the same timeline. Use Audio Speed Changer or Pitch Changer when timing or key should move. Use BPM Finder when you still need an estimated tempo. The audio looper online only repeats samples into a longer file.
Practical checklist
Start with a short source range in the audio looper online and listen across the join.
Choose quieter boundaries, similar vowels, or matching cymbal wash. There is no automatic zero-crossing search; adjust markers first.
Use Count for three eight-second copies or Target duration for a 30-second timeline. A target can end on a partial copy.
Check Preview seam before a large render. Adjust the markers or crossfade if it clicks.
MP3 input still produces WAV; repetition cannot restore lost detail or tags.
Keep the original and note the source range and repeat settings. Closing the tab discards the plan.
Input, output, and privacy
The audio looper online decodes one local file, repeats a source range, and writes 16-bit WAV. It does not find beats, snap to zero crossings, or encode MP3.
The picker accepts MP3, WAV, FLAC, M4A, AAC, and OGG up to 80 MB when the browser can decode the codec. Mono and stereo are supported; other channel counts fail before looping. The audio looper online does not upload the file to find another decoder.
Output is 16-bit PCM WAV at the decoded sample rate and channels. There is no MP3, M4A, FLAC, or OGG encoder, no batch ZIP, and no URL import. Count mode reports the overlapped duration. Target duration reports the exact planned length. The audio looper online stops when original PCM, output PCM, and WAV would exceed 384 MiB or when the WAV would cross the 4 GiB RIFF limit.
Filenames, PCM, exact duration, A–B points, repeat counts, target duration, crossfade values, and download bytes stay in this tab. Analytics receive a coarse tool action only. The audio looper online has no account, microphone recorder, or cloud save.
Related browser tools
Pitch, timing, direction, tone, automatic analysis, and tap-based tempo are different audio tasks. Open the tool whose controls match the result you need. Any file you choose stays inside that tool’s browser-local workflow.
Reverse a whole file or a marked A–B range when the job is playback direction, not a longer repeated file.
Open Audio Reverser →Change timing from 50% to 200% with pitch locked when you need the phrase slower or faster, not copied.
Open Audio Speed Changer →Estimate BPM, key, and Camelot first when you still need a tempo reading before choosing a loop length.
Open BPM Finder →Transpose by semitones or cents and control tempo separately when the next job is key, not repetition.
Open Pitch Changer →FAQ
Answers about repeats, exact duration, crossfades, and WAV limits.
An audio looper online repeats a recording or selected passage into a longer WAV, with a short preview of the join.
One MP3, WAV, FLAC, M4A, AAC, or OGG up to 80 MB, with browser decoding support and at most two channels.
Yes. No sign-up, payment, quota, or audio upload is required.
No. Processing stays in browser memory. Filenames, PCM, A–B times, counts, and downloads are excluded from analytics and processing APIs.
It exports 16-bit PCM WAV at the decoded sample rate and channel count. Compressed-format export and source tags are unavailable.
Count makes 2–20 copies, shortened by any crossfade overlap. Target duration produces the requested frame count, at least one source range long.
Adjacent copies overlap with complementary linear fades. Default: 0.05 seconds; range: 0–2 seconds, strictly shorter than half the source.
No. Repetition cannot recover detail or metadata discarded during MP3 compression. Keep the original file.
Combined source PCM, output PCM, and WAV must fit 384 MiB, with WAV below 4 GiB. Reduce the source range, repeats, or target duration if needed.
Audio Reverser reverses samples within the original timeline. The looper writes repeated copies of the full track or A–B selection into a longer WAV.
Set your length in the audio looper online, preview the seam, then create the repeated WAV.
Open the audio looper online