Audio & Video
Inspect and transform media locally without uploading files.
Available Tools (35)
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Interactive audio waveform
Inspect decoded audio waveforms, sample peak and RMS levels, clipping positions and local playback. Files must be smaller than 100 MB.
Single-Interval Audio Trimmer
Trim local audio with waveform handles, linear fades and selection playback; export PCM16 WAV.
Audio Normalizer / Compressor
Compress audio dynamics before peak or LUFS normalization, compare playback, and export local PCM16 WAV.
Independent speed and pitch
Change audio duration and pitch independently locally, preview and export PCM16 WAV.
Audio Silence Remover
Detect internal silence by amplitude threshold and duration, retain edge margins, inspect intervals and export locally.
Stereo split and noise gate
Split stereo into mono WAV, swap or mute outputs, and optionally suppress low-level gaps with a separate gate on each output.
Audio Reverser
Reverse audio samples with optional linear fade-in and fade-out, then download 48 kHz PCM16 WAV; input must be smaller than 50 MB.
Audio Panner & Balance Controller
Preview smooth stereo panning with separate live left/right RMS meters and export a fixed-pan 48 kHz PCM16 WAV. Local mono/stereo input must be smaller than 100 MB.
Multi-Band Audio Graphic Equalizer
Preview 5 or 10 equalizer bands live with pop, rock, vocal and bass presets, or render a separate WAV. Local audio must be smaller than 50 MB.
Audio Dynamic Range Compressor
Preview audio compression with a live gain-reduction meter and four controls, or export 48 kHz PCM16 WAV. Local input must be smaller than 50 MB.
Synthetic Convolution Reverb WAV Processor
Apply synthetic convolution reverb or a six-reflection room model locally with wet/dry control, then export 48 kHz PCM16 WAV. Input must be smaller than 50 MB.
Audio Transcoder (WAV/MP3/WebM/Ogg)
Convert local audio to WAV, MP3 or supported WebM/Ogg; process WAV batches sequentially and select 128/192/320 kbps for compressed output.
Voice Effects: Robot, Alien and Chipmunk
Apply robot, alien or chipmunk effects to local audio or a permitted microphone. Preview live, render files or record up to 30 seconds of microphone effects as WAV.
Tool category
Stereo Tone Generator
Generate four waveforms locally with stereo channel selection, balance, separate frequencies and PCM16 WAV export.
MP3 and FLAC tags and cover editor
Edit MP3 ID3 or native FLAC title, artist, album, date and cover locally; preserve compressed audio bytes without re-encoding.
Metronome clock and meter accents
Run a local audio-clock metronome with 2/4, 3/4, 4/4 or 6/8 accents and a visual pendulum.
Continuous white, pink and brown noise
Mix local white, pink or brown noise with synthesized rain, wind and fire textures, live blend controls, volume and a timer.
Two-Frequency Stereo Tone Generator
Play separate left and right sine tones with carrier and difference controls in Hz. Start, update or stop live audio; the existing short WAV exporter remains available.
Guitar & Instrument Tuner
Tune one guitar string at a time with live microphone pitch, a cents needle, and Standard or Drop D targets. Uses local YIN pitch analysis with A4 = 440 Hz.
MIDI Note Piano Roll
Inspect MIDI notes and timing in a piano roll and event table, with a limited local sine-wave playback preview.
Tool category
MP4/MOV box tree and Fast Start
Inspect MP4/MOV box headers locally, view their tree and offsets, and check structural moov/mdat Fast Start order. Read optional MP4/MOV track codec labels, declared average timing and audio sample rates. WebM track and duration declarations are also available.
Video frame capture and batch PNG
Capture local video at selected times as PNG in decoded source dimensions, with timeline controls, time steps and up to 12 batch images. Optional BT.709 source-matrix PNG capture is available for eligible native 8-bit YUV frames.
Screen Recorder with Microphone and Camera Options
Record a shared screen, window or tab locally with optional microphone audio and camera inset. Pause, resume and save WebM or native MP4 when supported.
Webcam & Microphone Recorder
Record camera and microphone locally with a live preview, preview-only mirror, microphone activity, pause/resume and download; requests ideal 1080p and reports actual dimensions.
Video contact sheet with grid and timecodes
Create a local PNG video contact sheet with 2–6 rows and columns, optional file information and per-frame time labels; input under 1 GB.
Tool category
Video crop rectangle and ratio presets
Select a video crop rectangle, lock common ratios, preview the result and export a local WebM for clips shorter than three minutes.
Video to Animated GIF Converter
Samples browser-decodable video frames, caps the longest GIF side at 480 px, quantizes each frame to at most 256 colors with gifenc, and returns an animated GIF data URL; no trim or WebP control.
Video Mute & Audio Stripper
Remove audio tracks and packets locally from supported MP4 or WebM files under 200 MB while keeping encoded video packets unchanged, without re-encoding.
Extract Browser-Decodable Video Audio to WAV
Choose a nonempty video smaller than 300 MB (300,000,000 bytes). Passes the selected video container to the browser audio decoder, obtains its audio stream at 48 kHz and exports PCM16 WAV. Video frames are not rendered into the audio download.
Video Speed & Slow Motion Controller
Preview local video at 0.25×–4× speed and export WebM with optional mute; input must be under 500 MB and shorter than 120 seconds.
GIF Speed Changer
Change GIF speed from 0.2× to 5× by rewriting delay bytes, preserving all image bytes; input under 25 MB.
Video Resolution Scaler
Draws browser-decoded frames directly to the requested canvas dimensions and records 30 fps WebM through MediaRecorder. Direct scaling can stretch the picture; there is no aspect-ratio, bitrate, or codec control.
Video Padding & Blurred Background Filler
Create portrait 9:16 WebM with a blurred backdrop and sharp centered video from a clip shorter than two minutes.
Video Start/End Frame Difference Check
Loop local videos, compare start/near-end images, and preview an adjustable silent crossfade. Input must be nonempty and under 100 MB.
Video Convolution Sharpening Preview
Applies the fixed clamped-edge 3×3 cross kernel [0,-1,0;-1,5,-1;0,-1,0] to browser-decoded frames and records 30 fps WebM. Width and height are capped independently at 1280 and 720; no strength or denoise control exists.