139 free browser-based tools — no signup, no upload
139 tools available
Generate hundreds of unique sound effects with a single click. Choose from 9 categories—explosions, lasers, coins, power-ups—and lock the parameters you like to fine-tune. Combine sounds on a DAW-style timeline to craft complex, layered effects.
Record anything playing through your PC speakers in high quality. Great for meeting backups, game audio capture, or saving audio from videos. No stereo mix setup or OBS needed—just click and record.
Add immersive 3D spatial audio to any sound file. Place sound sources anywhere in 360° using HRTF, create 8D audio orbiting around the listener, and produce binaural tracks for ASMR content.
Convert stereo to mono, mono to stereo, or swap and split left/right channels. Handy for podcast editing, PA setup checks, and any situation where you need quick channel manipulation.
Shift the pitch of any audio file up or down in semitone steps. Perfect for karaoke key changes, slowing down music for practice, or adjusting playback speed for language learning.
Visualize the frequency spectrum of any audio file in real time. Three display modes (bar, line, circle), peak frequency detection with note names (C4, A4, etc.), and band-level analysis for mixing and tuning.
Enter a win rate and number of trials to instantly calculate the odds of consecutive wins or hitting at least once. Results shown as a table and chart—great for gacha odds, lottery analysis, and probability homework.
Generate test tones from 20 Hz to 20 kHz in six waveforms: sine, square, triangle, sawtooth, white noise, and pink noise. Useful for speaker testing, instrument tuning, and hearing self-checks.
Extract still images from video files frame by frame. Set the FPS to grab one frame per second or every single frame, then save as JPG or PNG. Great for animation assets, thumbnail selection, and frame-by-frame analysis.
A full-featured drum machine with kick, snare, hi-hat (open/closed), and clap across 16 steps. Includes 9 preset patterns from four-on-the-floor to trap, swing control, per-track mixer, and WAV export.
Select your ceremony style, guest count, cuisine grade, and attire level to estimate total wedding costs and expected gift money. See your out-of-pocket amount at a glance—helpful for budgeting before venue visits.
Create text decorations for fan signs used at concerts and events. Place, rotate, and resize each character freely, add triple outlines and glitter textures, then export as transparent PNG ready to print and attach.
Instantly compare unit prices across products with different sizes and quantities. Supports 11 units (ml, g, kg, L, pieces, sheets, etc.) and up to 5 items side by side to find the best deal.