Audio Joiner

Arrange clips, inspect the resulting duration, and render the combined audio locally.

Choose two or more audio files

Transition

Gap / crossfade seconds

Output sample rate

0Clips

—Input duration

—Estimated output

—Output sample rate

Choose at least two filesReorder clips before rendering. Crossfade overlaps adjacent clips; gap mode inserts silence.

Trim a clip Loop a clip Fade audio Convert to WAV

Join preflight & transition budget

Verify transition math, sample-rate normalization and estimated PCM output size before export.

Audio evidence

Planned crossfade (s)

Target bit depth

Check	Value	Meaning

Source fidelity & reproducibility audit

Independently decode the selected local audio, fingerprint the source, inspect signal evidence, and rebuild the current processing plan from visible controls. This verifies browser-visible source and transformation math; it does not certify codec quality or mastering compliance.

Choose audio in the tool above, then refresh this source audit.

Browser-local source probe. Audio never needs to leave this page for this audit.

Audio processing cluster

Verify the source before trusting the render

Decode locally, confirm sample rate, channels, duration and level evidence, then apply the transformation. Keep codec, browser decode and export-format limits explicit.

Start: Audio Editor Inspect a File

All 24 audio tools

Sample RateResample rate, Nyquist and output frames Stereo → MonoDownmix, correlation and cancellation risk Speed ChangerDuration, pitch and resampling behavior Loop MakerLoop boundaries, seam and repeated duration Frequency AnalyzerFFT resolution and spectral evidence Bass BoosterLow-shelf gain and clipping headroom Audio JoinerClip order, transitions and output duration Loudness AnalyzerLUFS planning, peak and dynamics

Preview the current join before downloading

Render the same current clip order, gap/crossfade and output sample-rate plan into the existing audio player without starting a file download.

Choose and decode two or more clips above first.

Codec and measurement boundaries

Browser decoding differs across Safari, Chrome, Firefox, iOS, and Android. Rendered edits are exported as WAV unless a tool explicitly states another supported container. Loudness analysis is a practical BS.1770-style estimate rather than a certified meter, and sample clipping checks do not replace true-peak oversampling.

How to use the Audio Joiner

Choose at least two files, reorder them, pick a shared output rate, and choose either silence between clips or a simple crossfade overlap. Review the estimated output duration before rendering.

Why use it

Arrange clips, inspect the resulting duration, and render the combined audio locally.

Browser and audio limits

Crossfade is a linear sample overlap, not beat matching or mastering. Sources are decoded into memory, resampled when necessary, and exported as PCM WAV.

Transition integrity

The existing reorder/resample/gap/crossfade engine is preserved. Output signal preflight now exposes peak and clipping risk so overlapping full-scale clips are not silently treated as safe.

Practical guide and verification

Set the playback order before rendering

The track list is the final playback order. Reorder the decoded clips first, then verify their durations and transition settings before creating the combined buffer so an otherwise correct render is not assembled in the wrong sequence.

Crossfade and gap change total duration differently

A positive gap adds silence between clips, while a crossfade overlaps neighboring audio and shortens the combined duration. Compare the estimated output duration with the input-duration total before export.

Preview the exact current join before saving

Use the preview-only control to render the same current order, transition and sample-rate plan without starting a download. Listen around transitions and confirm clip order before using the normal Join & export WAV action.

Sample-rate normalization is a real transformation

Inputs with different sample rates must be brought to one output rate before their PCM samples can share a buffer. Keep the original files when sample-rate conversion quality or codec-specific metadata matters.

A WAV join does not preserve every source feature

The browser decodes supported source codecs and the tool creates a new WAV. Source container metadata, lossy codec frames, embedded artwork, chapters and application-specific tags are not promised to survive that decode-and-render workflow.