UD5 Toolkit
Spelling Test Practice - Online Audio Dictation & Typing
Hear a word spoken by browser TTS and type the spelling. Choose difficulty or paste your own list. Great for kids. Local only.
Tag: Audio Tools - Edit & Convert
45+ toolsMorse Code Audio Generator - Online Create CW Sound from Text
Type text and play it back as Morse code audio. Adjustable speed (WPM) and tone frequency. Great for learning Morse code or generating ringtones.
Whistle Signal Generator - Online SOS & Help Pattern
Play standard emergency whistle patterns (SOS, three blasts) using Web Audio. Learn signals for outdoor safety. Offline capable after load.
Online Audio Reverb Tool - Add Room Ambience
Add artificial reverb to an audio recording. Choose from small room to large hall. Wet/dry mix. Convolution‑based.
Audio Bit Depth Converter - Online 16‑bit ↔ 24‑bit
Change the bit depth of a WAV file without leaving the browser. Dithering option included. For audio engineers.
Bird Call Identification Quiz – Online Listen & Match
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.
Online Audio Click & Pop Remover - Clean Vinyl Recordings
Remove clicks, pops, and crackle from audio recordings. Useful for digitizing vinyl. Threshold‑based local processing.
WAV Header Viewer - Online Inspect Audio Format
Drop a WAV file and see its full header: sample rate, bit depth, channels, and chunk structure. Raw bytes explained.
Audio Format Converter - Online MP3 WAV FLAC OGG
Change audio files between MP3, WAV, FLAC, and OGG. Choose codec and bitrate. Works completely offline in the browser.
Audio Joiner - Online Concatenate Multiple Files
Upload multiple audio files and join them into a single continuous track. Add crossfade. All local.
Audio Sample Rate Converter - Online Resample WAV/MP3
Change the sample rate of an audio file (e.g., 48kHz to 44.1kHz) without leaving the browser. Ideal for podcast prep.
WASM Audio Decoder - Online Play FLAC/Opus Locally
Decode FLAC, Opus, or OGG audio files in the browser using compiled WASM libraries. Play instantly without server uploads. Keep audio private.
Online Audio Trimmer & Splitter - Cut MP3/WAV Locally
Trim audio files or split into multiple segments using visual waveform. Set start/end markers precisely. Download segments or merged track. Purely browser-based.
Video Audio Merger/Separator - Online Replace or Remove Soundtrack
Remove the original audio from a video and attach a new soundtrack. Or extract audio. All processed locally.
Speaker Frequency Sweep - Online Audio Test & Ear Check
Play a sweep from 20Hz to 20kHz. Test your speakers and your hearing. Simple and effective. Web Audio API.
Video to MP3 Extractor - Online Save Audio from Video
Extract the audio track from any video and save as MP3 or WAV. No re‑encoding; fast demux. Client‑side only.
Online Audio Noise Reducer - Free Background Hum Remover
Remove constant background noise from a short audio clip using a real‑time noise gate and spectral subtraction. All processing stays in your browser.
Simple Audio Waveform Cutter - Online Trim & Loop
Load an audio file and visually trim it by dragging handles on the waveform. Export the trimmed clip. All local.
Audio Loudness Meter - Online LUFS & RMS Analyzer
Measure the integrated loudness of an audio file in LUFS and RMS. Check if your music meets streaming platform standards. Client‑side.
Stereo to Mono Audio Converter - Online Merge Channels
Convert a stereo audio file to mono. Also swap or extract left/right channels. Quick podcast preparation. Browser-based.
Online Audio Compressor - Reduce Dynamic Range
Apply compression and limiting to an audio file with threshold, ratio, attack, and release controls. Improve loudness. All local.
Audio Volume Normalizer - Online Loudness Equalizer
Adjust an audio file's volume to a target loudness level (e.g., -14 LUFS). Prevent clipping. Works in the browser.
HTML Audio Visual Emphasis - Online Highlight Spoken Words
Combine TTS with text highlighting. See each word colored as it is spoken. For e‑learning content creation. Local.
WAV to MP3 Converter - Online Audio Compression
Convert WAV audio files to MP3 directly in your browser using a built‑in codec. Choose bitrate and quality. No upload.
Audio Duration Viewer - Online Get Length Without Player
Drop an audio file and instantly see its duration in seconds and formatted time. Read metadata without full playback.
Random Animal Soundboard - Online Hear Real Calls
Click buttons to play real animal sounds: lion roar, bird tweet, dolphin click. Studio recorded. No load.
Video to Audio Extractor - Online Save MP3 from MP4
Extract the audio track from any video file and download it as MP3 or WAV. Works offline; no server upload.
Audio Trimmer - Online Cut MP3 WAV Locally
Select a part of an audio file and trim it to the selection. Playback preview. Download the cropped audio. No upload.
MP4 to MP3 Audio Extractor - Online Save Sound from Video
Upload an MP4 video and extract only its audio track as an MP3 file. Quick and without server upload. Local processing.
Online Spectrogram Viewer - Audio Frequency Visualizer
Load an audio file and see its spectrogram with frequency over time. Adjust resolution and color map. Discover hidden sounds.
Audio to MIDI Converter - Online Transcribe Melody
Analyze a monophonic audio recording and convert the pitch into a MIDI file. Perfect for capturing musical ideas. Client-side.
Sound Wave Extractor - Online Isolate Vocals or Instrumental
Simple phase cancellation tool: load a stereo track and attempt to remove center‑panned vocals. Not perfect, but fun to experiment.
Voice Memo Recorder - Online Record & Download Audio
Record audio directly from your microphone and download it as a WAV file. Perfect for quick notes. No upload, fully offline support.
Audio Silence Remover - Online Strip Quiet Parts
Remove silent parts from an audio recording. Useful for podcasts and lectures. Set threshold and minimum silence duration.
Karaoke Echo Remover - Online Simple Audio Cleanup
Reduce reverb and echo from a vocal recording using a basic noise gate and filter. Quick cleanup for bad room acoustics.
Bird Sound Reference - Online Listen & Identify Common Calls
Browse a collection of common bird calls. Play short audio samples to identify birds you hear. Educational static data.
Morse Code Audio Player - Online CW Practice & Play
Enter text and generate the corresponding Morse code audio beeps. Adjust speed and tone. Great for learning and practicing CW. No download.
Audio to Base64 Converter - Online Embed Sound in HTML
Encode short audio clips into Base64 data URIs for direct embedding in HTML5 <audio> tags. No external files needed.
Audio Waveform Visualizer - Online See Your Sound
Visualize audio in real time from your microphone or uploaded audio file. See the waveform dance. Uses Web Audio API locally.
Text to Morse Code Decoder - Online CW Translation Tool
Translate text to Morse code with audio playback. Adjust speed and tone. An educational tool for amateur radio enthusiasts. Works offline.
Online Tone Generator - Audio Frequency & Sound Wave Tool
Generate pure audio tones of specific frequencies (Hz). Adjust waveform type (sine, square, sawtooth). Ideal for audio testing and science experiments.
Audio to GIF Waveform - Online Animated Sound Visualizer
Upload an audio clip and generate an animated GIF of its waveform dancing. Shareable sound snippet. Canvas magic.
Custom Audio Equalizer - Online 10‑Band Adjust & Presets
A 10‑band graphic equalizer applied to any audio file or mic input. Save presets. All processing via Web Audio API.
Audio Pitch Shifter - Online Change Key Without Speed
Shift the pitch of any audio clip by semitones without affecting playback speed. Perfect for music transposition. Local Web Audio.
Audio Converter - Online Convert WAV MP3 OGG Locally
Convert audio files between popular formats like WAV, MP3, and OGG directly in the browser. No upload, fast encoding using WebAudio and ffmpeg wasm.