Compare Two Audio Files
Compare two audio clips and see a similarity percentage
Audio File 1
Drop first audio file
Works with any file size -- files over 50MB may just take a little longer
Audio File 2
Drop second audio file
Works with any file size -- files over 50MB may just take a little longer
What is this tool?
Compares two audio files and shows how similar they sound, as a percentage -- useful for checking if two recordings are the same take, comparing a cover to an original, or spotting whether two files are duplicates despite different filenames or formats. Runs entirely in your browser -- neither file is uploaded anywhere.
How to use it
Upload two audio files and click Compare. Both are analyzed and broken into equal time segments, and each segment's frequency content and loudness are compared between the two files.
Being upfront about what this measures: this is a real spectral/acoustic similarity comparison (frequency content and loudness pattern over time), not an exact byte-for-byte or commercial audio-fingerprinting match like Shazam uses. Two different recordings of the same song will usually score high; two completely different tracks will score low; but this isn't forensic-grade duplicate detection. Files of different lengths are compared on a normalized time basis (each divided into equal segments), so a shortened or extended version of the same audio can still score reasonably high.
Watch: Compare Two Audio Files in Action
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Frequently asked questions
How to use Compare Two Audio Files
Upload two audio files and click Compare. Both files are analyzed and divided into equal time segments, and each segment's frequency content and loudness pattern are compared between the two files to produce an overall similarity percentage. Files of different lengths are compared on a normalized basis (each divided into the same number of segments proportionally), so a slightly shortened or extended version of the same underlying audio can still score reasonably high rather than being penalized purely for a length difference.
When to use it
Useful for checking whether two audio files are likely the same underlying recording despite different filenames, formats, or minor edits -- consolidating a folder of downloaded audio where duplicates might exist under different names, for instance. It's also useful for a rough comparison between a cover version and an original recording, or checking how similar two different takes of the same recording session actually sound to each other.
When not to use it
This performs a real acoustic/spectral comparison, but it's explicitly not commercial-grade audio fingerprinting (the kind of exact-match technology services like Shazam use) or forensic-grade duplicate detection -- if you need a legally or technically authoritative determination that two audio files are identical, this tool's similarity percentage is a helpful signal, not that level of proof. For detecting copyrighted content matches specifically, a dedicated content-ID system built and licensed for that purpose is the appropriate tool, not a general similarity checker.
Tips for best results
If you're comparing files specifically to find duplicates in a larger collection, start with files that have similar file sizes or durations as your first candidates to check -- while the tool does normalize for length differences, files of similar duration in the first place are statistically more likely to actually be duplicates than a very short clip compared against a very long one.
Limitations
Two genuinely different recordings that happen to share similar overall loudness and frequency characteristics (two calm acoustic tracks in a similar key and tempo, for instance) can occasionally score higher than expected on pure spectral similarity, even though they're not actually the same underlying audio -- treat a high score as a strong signal worth listening to confirm, not an automatic guarantee of identity.
Privacy
Both audio files are analyzed entirely in your browser -- neither file is uploaded to any server at any point in the comparison process.
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