Apply studio fade in and fade out volume envelopes to audio tracks online. Select linear, logarithmic, or S-curve transitions and download WAV files.
Audio Cutter — Cut & Trim MP3 and Audio Files Online Free
Cut, trim, and split MP3 and audio files online directly in your browser. Visual waveform editor with fade-in and fade-out effects using Audio Cutter.
Audio Converter — Convert MP3, WAV, OGG, M4A Online Free
Convert audio files between MP3, WAV, OGG, and WebM format directly in your browser. Fast, lossless, and completely client-side with Audio Converter.
Audio Bitrate Calculator — Sample Rate, Bit Depth & Bandwidth Estimator
Calculate uncompressed PCM data rates, streaming bandwidth, lossy compression bitrates (MP3, AAC, Opus, FLAC), and buffer storage accurately.
Audio Bit Depth Converter — 16-bit, 24-bit & 32-bit PCM Requantizer with Dither
Convert audio bit depth between 16-bit, 24-bit, and 32-bit float PCM online with TPDF dithering to eliminate quantization distortion. Download WAV.
Add Reverb to Audio Online – Free Algorithmic Reverberation & Room Simulator
Add studio reverb, room reflections, and ambient hall decay to audio online. Free Schroeder algorithmic reverb with decay time, damping, wet/dry mix, and lossless WAV export.
Add Music to Photo Online – Create Social Video Reels & Clips
Add audio music tracks to photo images online. Create Instagram Stories, TikTok reels, and YouTube Shorts clips with animated waveform overlays and WebM video download.
Add Echo to Audio Online – Free Audio Delay & Echo Effect
Add studio echo and delay effects to audio files online. Customize delay time, feedback, stereo ping-pong, high-frequency damping, and export lossless WAV client-side.
Add Background Music to Audio Online – Podcast Bed Mixer & Auto-Ducking
Add background music to podcasts, voiceovers, and voice notes online. Dynamic sidechain ducking, volume balance, loop music tiling, and lossless WAV export client-side.
Webhook Tester & HMAC Signer — Inspect & Test Webhook Payloads
Test, inspect, and validate webhook payloads client-side. Generate mock Stripe, GitHub, and Shopify webhooks with cryptographic HMAC-SHA256 signatures.