One focused task at a time
The tool is designed for focused changes to one audio file, not as a replacement for a multitrack workstation.
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Audio-Editor Online
About the project
An independent browser editor for specific audio tasks, maintained by Bruno Dissenha and documented according to the tool’s current behavior.
How the project is run
Content should not promise a feature before it exists and is tested. Each page states the available control, the observable result, and known limits.
Audio processing in this tab
The selected file is decoded and processed in the browser. The page may still load site resources and consented analytics.
Testable statements
Published formats, limits, and results are checked against the capability matrix and automated project tests.
Incremental changes
Interface, processing, codec, and content changes are validated separately to reduce regressions.
Currently verified scope
- Selection cutting, gain adjustment, fixed three-band EQ, and linear fades.
- Speed changes, high-pass and low-pass filters, reversal, and sequential joining.
- MP3, 16-bit PCM WAV, M4A/AAC, and FLAC export, with limits described on each tool page.
- MP3 and WAV as tested inputs; other formats depend on the browser decoder.
Performance and practical file size vary by browser, memory, and device. Keep a copy of the original file before editing.
What the tool does not do
Knowing what is missing usually saves more time than a feature list. These limits are deliberate, and they are described here so you can decide early whether you need a different program.
- LUFS and true peak metering
- Normalization works on sample peak at −1 dBFS. There is no integrated loudness meter and no inter-sample true peak detection, so streaming platform targets need to be checked in another tool.
- Parametric equalization
- The equalizer has three fixed bands at 320 Hz, 1 kHz, and 3.2 kHz. There is no movable frequency, no Q control, and no configurable shelving filters.
- Spectral repair and AI denoise
- Noise reduction uses high-pass and low-pass filters for rumble and hiss. There is no noise profile, spectrogram, spectral subtraction, or voice isolation.
- Multitrack and crossfade
- Merging queues up to five files in sequence. There is no track layering, simultaneous mixing, or crossfade between items.
- Saved projects
- Because nothing is sent to a server, there is also no account, saved project, or history across sessions. Closing the tab loses the edit state.
How claims are verified
An audio editor is easy to describe too generously. These four checks exist so the published copy keeps up with what the code actually does.
- Capability matrix
- A versioned list of what each tool actually does. Published copy is checked against it by an automated audit that flags claims without backing.
- Automated tests
- The project keeps unit tests over the audio processing and end-to-end tests that load real files in a browser, apply edits, and check the exported result.
- Visual baselines
- Screenshots compared on every change catch unintended layout shifts on the tool pages.
- Dated editorial review
- Each article carries the date of its last review and a version note describing what changed in the tool since publication.
The full methodology, including how articles are reviewed, is on the methodology page. See methodology
Funding
The tool is currently free to use. The project intends to be funded by advertising, provided ads remain separate from upload, editing, and download controls and respect consent choices.
Editorial responsibility
Bruno Dissenha maintains the product and reviews its content. Technical articles identify their method, review date, reproducible evidence, or primary source.
This page was last reviewed on 28 August 2026.