Microdeck.tools 100% In-Browser

Zero-Upload Audio Trimmer, Merger & Speed Changer

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Visualize audio waveforms, drag trim handles, strip leading/trailing silence automatically, concatenate multiple clips, change playback speed (0.5x–2.0x), and export crisp lossless 16-bit WAV with zero WASM overhead.

100% In-Browser No Server Storage Instant Results

Trim, Merge, Strip Silence & Adjust Speed with Zero WASM Download

Powered natively by your browser's Web Audio API. Load multiple audio clips to merge sequentially into crisp WAV.

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How It Works Under the Hood

The native browser AudioContext decodes MP3/WAV/M4A tracks into Float32 PCM buffers, resamples multi-file merges via OfflineAudioContext, detects active amplitude bounds for silence trimming, and encodes a clean RIFF WAV binary.

Step-by-Step Instructions

1

Load one or more audio tracks (or click Add Sample Audio Clip to test immediately).

2

Drag Trim Start/End sliders or click Auto-Trim Silence to snap to active audio.

3

Adjust playback speed (0.5x–2.0x), preview audio, and export lossless 16-bit WAV.

Key Features & Performance

  • Zero WASM Download Bloat: Runs natively on Web Audio API in a tiny JS bundle
  • Automatic Silence Trimmer: Strips quiet intros and outros in 1 click using amplitude gating
  • Multi-Clip Sequencer: Add multiple clips to stitch voice memos or sound effects seamlessly
  • Lossless 16-Bit WAV Export: Ready for video editors, ringtones, or podcasts

Local Browser Processing & Privacy

Traditional web converters upload your documents, snippets, or media files to remote servers. Zero-Upload Audio Trimmer, Merger & Speed Changer runs inside your browser tab:

Processed in This Tab

Your input text and files are processed locally without uploading payloads to a processing server.

No Tool Payload Logging

Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).

Tab Memory Lifecycle

Working outputs stay in your browser tab and are released when you reset the tool or close the tab.

Frequently Asked Questions

Why does this export WAV instead of requiring a 30MB FFmpeg download?

A pure TypeScript RIFF WAV encoder builds broadcast-ready 16-bit PCM files instantaneously with zero external WASM downloads or quality loss.

Can I merge two files with different sample rates?

Yes. Each added clip is automatically resampled via OfflineAudioContext to match the primary timeline sample rate.

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