OneTaskFree Media, Image, Audio and PDF Tools
Image Compressor, EXIF Stripper, Favicon Maker, WAV to MP3, Screen Recorder and PDF Editor
Media tools that never see your media. Every page here runs on the file you choose using the browser's own canvas, audio and file APIs, so the photo, recording or PDF you are working on never leaves the machine it is already on — and the result downloads straight back to you. The tools are grouped by the kind of file.
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Most used this week
Object Counter
Count coins, cells or particles in a photo by threshold.
Object Counter
Count coins, cells or particles in a photo by threshold.
Distortion And Bitcrusher
Distortion, bit reduction and sample-rate crushing for lo-fi sound.
Distortion And Bitcrusher
Distortion, bit reduction and sample-rate crushing for lo-fi sound.
Timelapse Recorder
Capture a webcam frame at set intervals and make a timelapse video.
3D Dice Roller
Throw physics dice in 3D, then read every face and the total.
Images 34
Resize, crop, compress, convert, redact, optimise and generate images without uploading.
ASCII Art Generator
Type a phrase, get block letters for a README or banner.
Add Border To Image
Frame a photo with a coloured border and padding.
Add Shadow To Image
Add a soft drop shadow to photos, logos, product cut-outs and screenshots.
Auto Crop Image
Trim the blank border around an image down to its content automatically.
Blur Image
Blur a whole photo, or brush over the parts to soften.
Business Card Maker
Design a print-ready business card at 300 dpi. Free, no account, no watermark.
Chromatic Aberration Effect
Split red, green and blue channels for a lens fringe or RGB glitch look.
Compress To KB
Hit an exact kB limit by searching for the right quality.
Edge Detector
Trace the outlines in a photo with Canny edge detection.
Favicon Package
Build a multi-size favicon.ico from any image.
GIF Frame Extractor
Save any frame of an animated GIF as a PNG.
Image Blend Modes
Layer two images with 15 Photoshop-style blend modes and opacity.
Image Compare
Spot differences between two images and get a similarity score.
Image Dithering Tool
Dither a photo with Floyd-Steinberg, Atkinson or ordered Bayer patterns to a few colours.
Image Histogram Viewer
Plot the RGB and luminance histogram of a photo and spot clipping.
Image Straightener
Auto-detect the tilt in a crooked photo or scan and level it.
Image To Mosaic
Turn a photo into brick, tile or square mosaic art with a piece count.
Low Poly Generator
Turn a photo into geometric low poly triangle art.
Object Counter
Count coins, cells or particles in a photo by threshold.
Panorama Stitcher
Merge overlapping photos into one panorama, aligned automatically in the browser.
Passport Photo Maker
Crop a photo to passport size and print a 6×4 sheet.
Photo To Cross-Stitch
Convert a photo into a cross-stitch chart with symbols, key and floss list.
Pixel Art Upscaler
Enlarge sprites 2× to 32× without blurring the pixels.
Poster & Flyer Maker
Design A4, A3 or Letter posters at 300 dpi. PNG or SVG, nothing uploaded.
QR Code Generator
QR codes for links, Wi-Fi, contact cards and more, as a PNG.
QR Code With Logo
A scannable QR code with your logo in the middle.
Replace Colour In Image
Swap one colour in a photo or graphic for another, keeping shading.
String Art Generator
Turn a photo into thread wound between nails, with the nail order included.
Watercolour Effect
Turn a photo into a soft watercolour painting with paper texture.
HEIC To JPG
Turn an iPhone HEIC photo into a JPEG.
Image To WebP
Convert to WebP, JPEG or PNG with a quality slider.
PNG To JPG
Shrink a PNG into a JPEG with a quality slider.
WebP To JPG
Turn a WebP into a JPEG that everything can open.
WebP To PNG
Turn a WebP into a PNG, transparency kept.
Audio 58
Pitch and speed, decibel meter, metronome, Morse audio, mono mixdown, tones, WAV to MP3.
Ambient Sound Mixer
Mix rain, wind, waves, fire, stream and crickets into your own soundscape.
Audio Channel Swapper
Swap stereo channels, copy one side to both, or invert polarity.
Audio Comparison
Compare two audio files by the numbers and by ear, loudness-matched.
Audio Duration Sum
Add up the total duration of a batch of audio files.
Audio Embed Code Generator
Build an HTML5 audio tag with the right MIME types and options.
Audio Info Inspector
Read the sample rate, channels, bitrate and levels of any audio file.
Audio Joiner
Merge several audio files into one, in order, with optional gaps.
Audio Looper
Repeat a selected clip many times with seamless crossfaded joins.
Audio Markers To Cue List
Type markers against a waveform, export cue sheet, chapters or labels.
Audio Mixer
Layer several audio files to play together, with clip-safe levels.
Audio Normalizer
Normalise audio to a peak dBFS or LUFS loudness target, in browser.
Audio Reverser
Reverse a whole audio file or one selected part, export WAV or MP3.
Audio Speed And Pitch
Slow down, speed up or transpose an audio file, then export WAV.
Audio Speed Changer
Speed up or slow down audio, keeping pitch or shifting it like tape.
Audio Sprite Maker
Pack sound effects into one audio sprite with a howler.js JSON map.
Audio Stereo Widener
Widen or narrow the stereo image with mid/side gain.
Audio To MIDI
Turn a hummed, sung or played melody into a MIDI file.
Auto Pan Effect
Sweep sound between left and right speakers in time with music.
BPM Detector
Detect the BPM of any audio file and export a click track.
Bass Booster
Boost bass with a low shelf and a limiter, in browser.
Chord Player
Click chords to hear them and loop a chord progression.
DC Offset Checker
Measure the DC offset of each channel and remove it.
DTMF Tone Generator
Play phone keypad touch tones for any digits and export WAV.
Decibel Meter
Read live sound level in decibels from your microphone.
Distortion And Bitcrusher
Distortion, bit reduction and sample-rate crushing for lo-fi sound.
Drum Tuner
Measure a drum's pitch from each hit and compare tension.
Echo And Delay
Add echo with delay time, feedback and mix controls.
Extract Audio From Video
Rip the audio track from a video to MP3 or WAV.
Hearing Range Test
Sweep or tune a tone to find the edges of your hearing.
Loudness Meter
Measure LUFS and true peak and check them against Spotify, YouTube and broadcast targets.
Low-pass And High-pass Filter
Cut frequencies above or below a point to remove rumble or hiss.
Melody Sequencer
Draw a melody on a step grid, loop it and download it as MIDI.
Metronome
Drift-free metronome with accented downbeats and WAV export.
Microphone Test
Check your microphone works, see its level and hear yourself.
Morse Code Sound
Type a message and hear it keyed as real Morse code.
Noise Gate
Mute background noise below a threshold between words.
Online Synthesizer
Play a subtractive synth with oscillator, filter, ADSR envelope and echo controls.
Pitch Shifter
Transpose audio in semitones with the tempo unchanged.
Scale Player
Hear any scale or mode played in any key on a keyboard.
Silence Finder
Find and timestamp every silent gap in a recording.
Silence Generator
Download a silent WAV file of any length and sample rate.
Silence Remover
Shorten every long pause in a recording to a fixed gap, automatically.
Silence Splitter
Detect silent gaps and export each sound between them as its own file.
Spectrogram
Turn any audio file into a spectrogram image, time against frequency.
Spectrum Analyzer
Live FFT spectrum of the microphone or any audio file, in browser.
Sweep Generator
Sine sweep between any two frequencies, exportable as WAV.
Telephone And Radio Effect
Telephone, radio, walkie-talkie and megaphone voice presets.
Tone Generator
Play any frequency as a pure tone and export it as WAV.
Vocal Remover
Remove or isolate centre-panned vocals from a stereo song.
Waveform Viewer
Zoom into any audio file and save its waveform as a PNG image.
Audio To Base64
Turn a short audio clip into a base64 data URI.
Audio To CSV/JSON
Export raw audio samples as CSV or JSON for analysis.
Audio To WAV
Convert MP3, M4A, FLAC or OGG to 16- or 24-bit WAV.
Bit Depth Converter
Convert 24-bit to 16-bit WAV with proper dither.
MOD Player
Play MOD, XM, S3M and IT tracker modules with a playlist and loop.
MOD To WAV Converter
Convert MOD, XM, S3M and IT modules to WAV or MP3, in bulk.
Stereo To Mono
Downmix stereo audio to mono and export it as WAV.
WAV To MP3
Encode WAV or other audio to MP3, without uploading it.
Video & Screen 32
Record your screen, grab a frame from a video, inspect viewport and screen size.
Blink Counter
Webcam blink counter, blink-rate monitor and stare reminder. Nothing uploaded.
Blur Video Region
Hide one part of the frame with blur, pixelation or a black box.
Camera Framing Guide
Frame your webcam shot with a thirds grid, safe areas and crop guides.
Camera Mirror
Use your webcam as a mirror, with zoom and a true-view switch.
Codec Support Checker
Check which video codecs and containers this browser supports.
Countdown Video Generator
A countdown timer clip with a ring and beeps, in your colours.
Face Mesh Filter
Live face mesh, glasses, moustache and mask overlays on your webcam. Nothing uploaded.
Fingerspelling Practice
Practise ASL fingerspelling with webcam hand tracking that reads your letters. Nothing uploaded.
Frame Difference Viewer
Highlight the pixels that change between two frames of a video.
Frame By Frame Viewer
Step through a video frame by frame and save any frame.
Green Screen Video Editor
Swap a green screen for any picture or video.
Head-Tracked Parallax
Head-tracked 3D parallax illusion driven by your webcam. Nothing uploaded.
Photo Booth
Eighty live webcam effects. Snap a PNG or record a WebM, locally.
Screen Recorder Browser
Record your screen or webcam to a WebM file, locally.
Side By Side Video Maker
Join two videos into one split-screen file with labels.
Slideshow Maker
Photos plus an optional song become a slideshow video with fades.
Timelapse Recorder
Capture a webcam frame at set intervals and make a timelapse video.
Upload Time Calculator
See how long a file will take to upload at your connection speed.
Video Color Analyzer
See a video's colour barcode, palette and average brightness.
Video File Size Estimator
Work out a video's file size from bitrate and length.
Video Frame Capture
Save a still frame from a video at any timestamp.
Video Resizer
Scale a video down (or up) to a standard resolution.
Video Speed Changer
Speed up or slow down a whole video, with or without its sound.
Video Splitter
Split one video into equal parts or at set timestamps.
Virtual Green Screen
Paint your webcam background chroma green live, no fabric needed. Snap a keyable PNG.
Webcam Background Remover
Blur, replace or remove your webcam background live. Nothing uploaded.
Webcam Test
Check your camera works and see its real resolution and frame rate.
FPS Converter
Convert a video to a different frame rate, keeping its speed.
Image Sequence To Video
Join numbered still frames into a video at any frame rate.
Text To Video Card
Turn a line of text into a title card video with a simple animation.
Video To Image Sequence
Save a video's frames as numbered PNG or JPG files in a zip.
Video To WebP
Turn a video clip into a small, looping animated WebP.
PDF 3
Merge, split, extract, delete, rotate and watermark PDFs in the browser, nothing uploaded.
SVG 2
Format, fix, recolour, sprite and generate SVG without leaving the browser.
Simulations & Screensavers 17
Boids, Game of Life, falling sand, Matrix rain, fireworks and more, fullscreen.
3D Coin Flip
Toss a physics coin in 3D and watch it land heads or tails.
3D Dice Roller
Throw physics dice in 3D, then read every face and the total.
3D Domino Toppling
Line up 3D dominoes and topple them with real physics.
3D Jenga
Pull blocks from a 3D physics tower until it falls.
3D Physics Sandbox
Drop and blast 3D shapes in a real physics playground.
Cloth Simulation
Hang a sheet of cloth, drag it, cut it and blow it around.
Domino Run Simulator
Lay a line of dominoes, press Topple and watch the chain reaction.
Fireworks
Rockets, bursts and fading sparks; click to launch; fullscreen.
Langton's Ant
Two-rule ant that builds chaos and then a highway; sliders and fullscreen.
Lava Lamp
Blobs that rise, merge and split; four colours, fullscreen.
Matrix Rain
Falling green code with speed, size, trail and colour; fullscreen.
Music Visualiser
Bars, waveform or circle driven by your microphone; fullscreen.
Newton's Cradle Simulator
Lift one or more balls of a Newton's cradle and watch momentum pass through.
Physics Sandbox
Drop shapes, drag them around and play with gravity, bounce and friction.
Ragdoll Physics Game
Grab a ragdoll by any limb and throw it around a physics playground.
Reaction-Diffusion
Gray-Scott chemistry growing coral, spots and fingerprints; fullscreen.
Wrecking Ball Simulator
Swing a chained wrecking ball into a 3D brick building.
Generative Art 14
Seeded wallpapers, flow fields, spirographs, fractals; PNG at wallpaper size.
Abstract Art Generator
Random shapes, lines, blocks and splatter in five palettes, seeded.
Celtic Knot Generator
Seamless Celtic knotwork tiles with over-and-under strands as PNG or wallpaper.
Flow Field Generator
Particles traced through a Perlin noise field; the classic generative-art look.
Harmonograph Generator
Damped pendulum figures; set frequencies, detune and damping, save the spiral.
Hex Grid Pattern Generator
Seamless honeycomb outlines or tinted hex cells as a PNG tile or wallpaper.
Islamic Geometric Pattern Generator
Seamless Islamic star pattern tiles from square, octagon or hexagon grids.
Isometric Grid Pattern Generator
Seamless isometric line, diamond, dot or triangle grids as PNG tiles or wallpapers.
Lissajous Curve Generator
Two sine waves at right angles; set the frequencies and phase, save the figure.
Mandelbrot Explorer
Click to zoom into the Mandelbrot set; export the view at 4K.
Perlin Noise Texture
Clouds, marble, wood grain and more from layered Perlin noise; PNG up to 4K.
Rose Curve Generator
The r = cos(kθ) flower; set n and d, save the petals as PNG.
Spirograph Generator
Set the ring, gear and pen offset; the curve draws until it closes.
Truchet Tile Pattern Generator
Random Truchet arcs and diagonals as a seamless PNG tile or wallpaper.
Wallpaper Generator
Random abstract backgrounds, six palettes, saved at desktop or phone size.
Chart Makers 3
Paste CSV, get a bar, line, pie or scatter chart; download SVG or PNG.
Australian States Choropleth Map Maker
Paste state, value rows; get a shaded Australia map; export SVG, PNG.
Bubble Chart Maker
Paste name,x,y,size rows, get a labelled bubble chart; SVG or PNG.
UK Regions Choropleth Map Maker
Paste region, value rows; get a shaded UK regions map; export SVG or PNG.
3D Model Viewers 4
Drop a glTF, OBJ, STL, FBX or PLY file and orbit it in-browser.
3MF Viewer
Open a 3MF print file, orbit it and check its parts and size.
OBJ Viewer
Drop an OBJ with its MTL and textures, orbit it, download a PNG.
STL Viewer
Drop an STL, orbit it, read its size and triangle count, save a PNG.
STL To GLB
Convert STL to GLB in the browser with colour and up-axis fixed.
Drawing Pads 3
Sign, sketch, doodle or grid a photo; download PNG or SVG.
Mockups & 3D Making 9
Panorama viewers, packaging and device mockups, 3D text, voxels and terrain.
360° Panorama Viewer
Drop an equirectangular 360° image and look around inside it.
3D Book Cover Mockup
Wrap a cover on a 3D paperback and download a PNG.
3D Box Mockup
Wrap packaging artwork on a 3D box and download a PNG.
3D Text Generator
Extrude text into 3D and download it as a PNG.
Heightmap Terrain Preview
Turn a greyscale heightmap into a 3D terrain you can orbit.
Little Planet Maker
Squash a 360° panorama into a little planet PNG.
Normal Map Generator
Turn a height image into a normal map and preview it lit in 3D.
Product Spin Viewer
Drop a photo sequence and drag to spin the product round.
Voxel Art Editor
Click blocks into a 3D voxel model and export OBJ or PLY.
Diagram Makers 4
Type an edge list or outline, get a Sankey, treemap, org chart or flowchart.
Arc Diagram Maker
Type a -> b lines and download an arc diagram as SVG or PNG.
Flowchart Maker
Type step -> step lines and download a flowchart as SVG or PNG.
Network Graph Maker
Paste an edge list and download a force-directed network graph as SVG or PNG.
Sankey Diagram Maker
Type source -> target lines and download a Sankey diagram as SVG or PNG.
3D Science 10
Orbits, planets, molecules, crystals, 3D graphs, sun paths and floor plans in the browser.
3D Function Plotter
Type z = f(x, y) and orbit the surface it makes.
3D Vector Field Plotter
Type Fx, Fy, Fz and see the field as coloured arrows.
Crystal Lattice Viewer
Orbit unit cells of the common crystal structures, read their packing numbers.
Earth Day And Night Map
3D globe showing daylight and night for any date and time.
Floor Plan 3D Preview
List rooms as rectangles and walk around them in 3D.
Molecule Viewer
Open a PDB or XYZ molecule in 3D, orbit it, save a PNG.
Parametric Surface Plotter
Plot x(u,v), y(u,v), z(u,v) as a 3D surface and orbit it.
Rubik's Cube Solver
3D Rubik's cube that plays moves and solves any state.
Solar System Simulator
3D planets in their real positions for any date, with orbits and time control.
Sun Path And Shadow Simulator
Sun arc and pole shadow for any place, date and hour.
Tracker Music 2
Play, convert and take apart MOD, XM, S3M and IT tracker modules.
Guides for common jobs
- Name and brand a new business — Eight free tools that take a business from no name to a first invoice.
How the media tools are organised
Images is the largest group: cropping to an aspect ratio, compressing to a target size in kilobytes, stripping EXIF data, building a favicon package, adding film grain, extracting GIF frames, changing DPI, redacting, converting to ASCII or WebP, upscaling pixel art, hiding text in an image, removing a background to transparent PNG, optimising SVG, and generating QR codes, barcodes and ASCII art.
Audio turns the browser into a small studio: pitch and speed changes, a decibel meter, a metronome, Morse code as sound, stereo to mono, a tone generator and WAV to MP3 conversion.
Video & Screen records your screen, captures a still frame from a video, and inspects the viewport you are looking at.
PDF counts pages, rotates, splits and watermarks — the routine edits that usually mean uploading a document to a site you have never heard of.
Why a media tool being local matters more than most
A photo carries the coordinates of where it was taken. A PDF carries the name of whoever created it and often a draft history. A screen recording carries everything that was on your screen. Uploading any of these to a converter means trusting a stranger with that metadata as well as the content. These tools decode, process and re-encode entirely on your device, so the only copy that exists is the one you already have and the one you download.
Vector, raster and the gap between them
Several tools sit on the boundary between formats. SVG optimisation removes editor cruft without changing the drawing; WebP conversion trades a little compatibility for a lot of file size; DPI changes alter how a print program sizes the image without touching a single pixel. Each page explains which kind of change it makes so you know whether the output is lossless.
Practical limits
Because the work happens in your browser, the limit is your device's memory rather than a server's upload cap. A phone will comfortably handle a photo; a multi-gigabyte video is better handled by a desktop application, and the pages say so where it matters.
FAQ
Are my images or PDFs uploaded to a server?
No. Files are read with the browser's File API and processed on a canvas or in memory inside the page. There is no upload endpoint on this site, so there is nothing to receive them and nothing stored afterwards.
Does stripping EXIF data change how my photo looks?
Not visibly. The image is decoded and redrawn pixel for pixel, then re-encoded without the metadata block. A JPEG re-encode is lossy in principle, so the tool encodes at high quality — and offers PNG output if you need a mathematically identical result.
Why is there a file size limit in practice?
Because everything runs in your browser's memory rather than on a server. A very large image or a hundred-page PDF is limited by the RAM available to the tab, which on a modern desktop means several hundred megabytes is usually fine and a phone will manage less.
Can I use these tools without an internet connection?
Yes, once the page has loaded. The tools are plain JavaScript served with the page, no library is fetched from a CDN, and none of them makes a network request while running — so they keep working with the connection off.
Is the output free to use commercially?
Yes. Images, barcodes, audio and PDFs produced here are yours, with no licence, attribution requirement or watermark attached. A generated EAN-13 still needs a number you are entitled to use, which comes from GS1 rather than from us.
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