Free Apps and ToolsNo Catch, No Subscription
New additions for files, fonts, code, audio, and data. Explore 394 new tools
Browse calculators by topic Finance, everyday life, construction, conversions, and more.
141 apps · Showing 97–141
Video & Audio
141 appsVideo & Audio: Enhance
Denoise Video
Reduce low-light grain and compression noise without aggressive smoothing.
Make Video Black and White
Create a neutral grayscale copy with the original soundtrack intact.
Sharpen Video
Improve edge definition with a controlled unsharp filter.
Stabilize Video
Analyze camera movement, reduce shake, and keep the frame filled with a careful two-pass stabilization.
Video & Audio: Text & overlays
Add Image to Video
Place a photo, graphic, label, or sponsor mark over a video and keep it within safe margins.
Add Logo to Video
Overlay a PNG, WebP, or JPG logo with simple scale, position, and opacity controls.
Add Subtitles to Video
Burn an SRT, VTT, or ASS subtitle file into the picture with readable styling.
Add Text to Video
Add readable text with placement, size, color, timing, and a subtle contrast box.
Add Text Watermark to Video
Place a restrained text watermark with exact position, size, color, and opacity.
Burn Captions into Video
Make an SRT, VTT, or ASS caption track permanent so it appears in every player.
Extract Subtitles from Video
Extract the first embedded subtitle track as a separate SRT file when the video contains one.
Video & Audio: Create & inspect
Create Audio Spectrum Video
Turn an audio file into a polished spectrum animation with the original sound attached.
Create Audio Waveform Video
Turn an audio file into a shareable video with an animated waveform and the original sound.
Create Photo Slideshow
Arrange up to twelve images, set the pace, and create one clean video with gentle motion.
Create Video Thumbnail
Capture a sharp JPG from an exact moment for covers, posts, and previews.
Extract Frames from Video
Export JPG frames at a chosen interval and download the checked set in one ZIP.
Image to Video
Turn a JPG, PNG, WebP, or AVIF into a playback-ready video with a gentle zoom option.
Inspect Video Metadata
Read container, codec, dimensions, frame rate, duration, audio, subtitle, and tag details in one report.
Video & Audio: Convert
Video & Audio: Audio Analysis
Video & Audio: Music & Sound
ABC Notation Editor
Write ABC music notation and see the score. Listen to the tune and download ABC, SVG or MIDI files.
Ambient Sound Mixer
Mix your own sound loops. Set each volume, choose which clips repeat and use a sleep timer to stop playback.
Audio Clip Marker
Mark clips on an audio waveform. Set exact start and end times, listen to each section and save the timestamps.
Audio Feature Explorer
Explore changes in an audio recording. See charts of sound level and frequency features, then download the measured values.
Folk Tune Transposer
Transpose an ABC folk tune to a new key. Preview the score, listen to the result and download the rewritten tune.
Interval Ear Trainer
Practise hearing the distance between two notes. Choose your musical intervals, listen and check your answers.
Live Audio Effects Playground
Try live effects on an audio file. Adjust volume, filters, left-right balance and echo while listening to the result.
MIDI Piano-Roll Inspector
Open a MIDI file and see its notes on a piano roll. Explore tracks and tempo changes, listen and export note data.
MIDI Transposer
Move MIDI notes up or down in pitch. Choose tracks and note ranges while keeping timing and other MIDI events.
Podcast Chapter Editor
Add chapters to a podcast while you listen. Name each chapter, adjust its time and download the chapter list.
Rhythm Reading Trainer
Practise reading and tapping musical rhythms. Listen to a pattern, tap along and see how close your timing was.
Scale & Chord Finder
Find notes and chords in major and minor scales. See them on a keyboard and listen to each scale or chord.
Sheet Music Snippet Maker
Make a short piece of sheet music from notes and durations. Choose the clef, time signature and tempo, then save the score.
Soundboard Builder
Make a soundboard from your own audio clips. Name each pad, set volumes and play sounds with buttons or keyboard shortcuts.
Stereo Channel Tester
Test your left and right audio channels. Play a tone, adjust its pitch and run an automatic channel check.
Timbre Comparison Tool
Compare the tone and sound level of two recordings. View matching charts and download their measured differences.
Video & Audio: Music Practice
Microphone Instrument Tuner
Tune a single instrument note using your microphone. See the nearest note, frequency and cents sharp or flat with standard A4 = 440 Hz tuning.
Music Practice Metronome
Practise with a steady beat from 30 to 240 BPM. Choose quarter, eighth or sixteenth notes, adjust the volume, and follow the visual beat markers.
Video & Audio: On-Device AI
Video & Audio: Sessions & Timers
Video & Audio: Subtitles
SRT ↔ VTT Converter
Convert subtitle timestamps between SubRip and WebVTT and download the new subtitle file.
Subtitle Language Worksheet
Turn subtitles into a study worksheet with timestamps, original lines, and space for your translation.
Subtitle Overlap Checker
Find overlapping subtitle cues and short gaps in an SRT or WebVTT file.
Subtitle Reading Speed Checker
Measure characters per second for every subtitle cue and find lines that may be too fast to read.