All Tools
Images · PDF · Audio/Video · Dev · Math — 180+ free tools, ready to use
204 tools
Online image processing
Image to Base64
Convert image to Base64 encoded string
Image Resizer
Resize images online with quality control
Image Filter
Apply grayscale, sepia, blur filters to images
Image Crop
Crop images online with free and fixed aspect ratios
Image Invert
Invert, grayscale, and black & white image processing
Channel Splitter
Split an image into separate red, green and blue channel maps.
Pixel Art Generator
Convert an image into pixel-art style at adjustable resolution.
Image Outline Extractor
Extract subject outlines from an image by edge thresholding.
Image Flip
Flip an image horizontally or vertically.
Image Fade Mask
Apply a fading edge mask to an image.
Sketch Converter
Turn a photo into a pencil-sketch style drawing.
Image Mosaic
Pixelate an image with adjustable block size.
Circle Crop
Crop an image into a circle with transparent background.
AVIF to BMP
Free online AVIF to BMP converter, processed locally in your browser, no upload.
AVIF to GIF
Convert AVIF to GIF format, processed locally.
AVIF to ICO
Turn AVIF into an ICO icon for websites or apps.
AVIF to JPG
Batch convert AVIF to JPG for better compatibility.
AVIF to PNG
Convert AVIF to PNG, keeping transparency and lossless quality.
AVIF to SVG
Wrap AVIF into a scalable SVG container.
AVIF to WebP
Convert AVIF to WebP, smaller and more compatible.
HEIC to JPG
Batch convert iPhone HEIC/HEIF to JPG for cross-platform use.
Batch Image Converter
Convert between JPG/PNG/WebP/HEIC/BMP freely, batch supported.
PNG to JPG
Batch PNG to JPG with size savings and custom fill color.
SVG to PNG
Convert SVG to PNG with size, background and DPI options.
Image to AVIF
Batch convert images to AVIF, up to 50% smaller.
Image to JPG
Convert any image to JPG, transparent areas filled white.
Image to PNG
Convert any image to PNG, preserving the alpha channel.
Image to WebP
Convert PNG/JPG to WebP, up to 80% smaller.
WebP to JPG
Batch convert WebP to JPG, supports animation and transparency.
Image Editor
All-in-one image editor: compress, crop, rotate, round corners, merge, split, blur, watermark, adjust, resize
ID Photo Background Changer
One-click AI background removal for ID photos, with white/blue/red/custom background colors.
EXIF Viewer
Read and display EXIF metadata and DPI from JPG/PNG.
EXIF Editor
Edit DPI and remove GPS metadata (re-encode applies changes).
DPI Checker
Check pixel dimensions, DPI and print size of an image.
DPI Converter
Change image DPI to print standards like 300.
GIF Maker
Edit frames or make GIFs from images and videos.
Images to GIF
Combine multiple images into a GIF animation.
Video to GIF
Convert a clip from MP4/MOV video into a GIF.
GIF Compressor
Shrink GIF size via frame, dimension and color optimization.
GIF Cropper
Crop a region or ratio of a GIF without breaking animation.
GIF Resizer
Resize a GIF by pixels or percentage with presets.
GIF Rotator
Rotate a GIF by 90, 180 or 270 degrees.
GIF Reverser
Reverse the playback order of a GIF.
GIF Speed Changer
Change GIF playback speed from 0.1x to 5x.
GIF Merger
Concatenate multiple GIFs into one.
GIF Trimmer
Trim a GIF to a selected segment.
GIF Frame Extractor
Extract every frame of a GIF as JPG/PNG.
GIF Text Adder
Add captions or meme text onto a GIF.
GIF to MP4
Convert a GIF into a smaller MP4 video.
APNG to GIF
Convert an APNG animation into a GIF.
WebP to GIF
Convert an animated WebP into a GIF.
GIF to Live Photo
Convert a GIF into an iPhone Live Photo wallpaper.
GIF to Sprite Sheet
Turn a GIF into a single sprite sheet image.
Typing Text GIF
Make a typewriter-effect text GIF.
Live Photo to GIF
Convert an iPhone Live Photo into a GIF.
Sprite Sheet to GIF
Rebuild a GIF animation from a sprite sheet.
Image Color Picker
Upload an image, pick colors by clicking and copy HEX/RGB.
Image Palette Extractor
Extract the dominant colors from an image into a palette.
Image Border
Add inner/outer borders or padding to an image.
Image Stamp
Stamp text marks like 'Reviewed' onto an image.
Long Image Slicer
Slice a long image into pieces by fixed height or custom positions.
Image Effects
Frosted glass, tiling, mirror symmetry and color replace effects.
Remove White Background
Auto remove the white background and export a transparent PNG.
Compress JPG Keep EXIF
Compress JPG while keeping shooting EXIF metadata.
Emoji to Image
Render an emoji and export it as PNG or SVG.
Edit, convert, record and generate audio — all locally in your browser.
Audio Converter
Convert audio between MP3, WAV, OGG and FLAC with sample-rate and channel options.
Audio Cutter
Trim audio by selecting a region on the waveform and export the clip.
Voice Recorder
Record from your microphone with a live waveform and download as WAV or MP3.
Tone Generator
Generate sine, square, triangle, sawtooth tones and white noise with adjustable frequency.
Instrument Tuner
Detect pitch from your mic and tune guitar, ukulele and more.
Audio Metadata Viewer
View duration, bitrate, codec and channel info of an audio file.
Audio Waveform Viewer
Render the waveform of an audio file to inspect amplitude.
Audio Spectrogram
Generate a spectrogram heatmap showing frequency over time.
Audio Speed Changer
Change playback speed without altering pitch.
Ringtone Maker
Trim a clip and export it as an M4R or MP3 ringtone.
Audio Editor
All-in-one editor: cut, join, change speed, reverse, adjust volume, fade and normalize.
Audio Generator
Tone, silence, metronome and BPM tapper in one tool.
Audio Parameters
Adjust sample rate, bit depth and mono/stereo channels.
Audio Effects
Add reverb, echo and multi-band equalizer effects to audio.
Extract audio, capture frames, convert, edit and watermark videos — pure frontend.
Extract Audio from Video
Extract the audio track from a video and save as MP3 or WAV.
Video Frame Extractor
Capture frames from a video at chosen positions and export as images.
Video Converter
Convert videos between MP4, WebM, MOV, AVI, MKV and more.
Video Watermark
Add a text or image watermark to your video frame by frame.
Video Editor
Cut, merge, change speed, reverse, rotate, mute, adjust volume and watermark.
Video Compressor
Reduce video file size while keeping acceptable quality.
Video to WebP
Convert a video to a smaller animated WebP.
Merge, split, compress, encrypt and convert PDF — files never leave your device.
Merge PDF
Combine multiple PDF files into one document.
Split PDF
Split a PDF by page ranges or every N pages.
Compress PDF
Shrink PDF file size for easier sharing.
Encrypt PDF
Protect a PDF with an open password and permission restrictions.
PDF to Image
Render each PDF page to a PNG or JPG image.
Image to PDF
Combine multiple images into a single PDF.
PDF Organizer
Rotate, delete, extract, reverse, reorder pages and add page numbers.
PDF Converter
Convert PDF to images, images to PDF and apply grayscale.
PDF Form Filler
Open a PDF with fillable fields, fill it out right in your browser and export a new file — no printing needed.
Timers, stopwatch and daily tools
Screen Color Test
Display solid colors/gradient scales fullscreen to detect dead pixels
Stopwatch
Online stopwatch with laps and pause
Pomodoro Timer
Pomodoro technique timer to boost focus
Off-Work Countdown
Set work hours, see real-time countdown to quitting time, today progress, slacking index and days to weekend.
Retirement Countdown
Enter birth date and retirement age to calculate days to retirement, progress percentage and fun stats.
Time Interval Calculator
Pick two dates to calculate exact interval in days, hours, minutes, seconds with multi-unit conversion.
Birthday Calculator
Enter birth date to see days lived, hours, minutes, plus fun stats like heartbeats and breaths.
Sensor Visualizer
Real-time device sensor data display, gyroscope accelerometer compass visualization
Angle Protractor
Measure and draw angles on a canvas.
Screen Ruler
Overlay a draggable ruler to measure pixels on screen.
Timezone Converter
Convert and compare time across multiple time zones.
Decibel Meter
Measure ambient decibels in real time via microphone.
Online Lottery
Import a name list and draw winners fairly.
Drawing Board
A free drawing canvas with color and brush options.
Keyboard Tester
Visualize key presses and test your keyboard.
Mouse Tester
Test mouse clicks, wheel and movement.
World Clock
View the time and date of multiple cities at once.
Archive Tool
Compress and extract ZIP, TAR and GZ files online.
ICS Calendar Toolbox
Merge, filter and export ICS calendar files.
Gantt Planner
Plan task schedules and export a Gantt chart.
Ovulation & Due Date Calculator
Estimate your ovulation window, fertile days and due date from your last period and cycle length.
I Ching Divination
Toss six coins to simulate tortoise shell divination and find your hexagram
Coin Flip
Flip a coin online, heads or tails randomly
Various format converters
Unit Converter
Various unit conversion tools
JSON Formatter
JSON beautify, minify and validate tool
Base64 Encode/Decode
Base64 encode and decode tool
Timestamp Converter
Convert Unix timestamp to date and vice versa
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin
Angle Radian Converter
Convert between degrees and radians.
Geo Coordinate Converter
Convert between decimal and DMS geo coordinate formats.
CSV XLSX Converter
Convert between CSV and Excel (XLSX).
Various content generators
Password Generator
Generate secure random passwords
QR Code Generator
Generate QR code images
UUID Generator
Generate standard UUID v4 unique identifiers
Random Number Generator
Generate random integers or decimals within a range
Word Cloud
Generate word cloud images by shape and color, pure frontend
Meme Generator
Pure frontend Canvas meme maker, upload image and add text
Artistic QR Code
Gradient color dot style artistic QR code generator
ASCII Art Generator
Convert uploaded image to ASCII character art, pure frontend
SVG Pattern Generator
Generate seamless tiled background SVG patterns, copy CSS code
Lottery Number Picker
Randomly generate lottery numbers like double-color ball and lotto
Common developer tools
Regex Tester
Test regular expressions online with match highlighting
HTML Encode/Decode
HTML entity encode and decode tool
Cron Parser
Parse cron expressions to human-readable description
HTTP Status Codes
HTTP status code quick reference with categories and details
Code Formatter
Format and beautify CSS/JS/SQL/XML code
Hash Generator
MD5/SHA-1/SHA-256/SHA-512 hash calculator
CSS Shadow Generator
Visually tune parameters and generate box-shadow CSS.
Border Radius Generator
Adjust four-corner rounding and generate border-radius CSS.
SVG Path Simplifier
Simplify SVG path points by tolerance to reduce size.
CSS Animation Generator
Configure keyframes and generate @keyframes animation CSS.
Barcode Generator
Generate Code128, EAN-13, UPC-A barcodes.
Subtitle Editor
Edit SRT/VTT subtitles with timeline shift and validation.
API Tester
Send GET/POST/PUT/DELETE requests right in your browser.
Text Encryptor
Encrypt and decrypt text with AES-GCM or RSA-OAEP, all locally.
DNS Lookup
Look up DNS records for any domain via Cloudflare public DNS — A, AAAA, CNAME, MX, TXT and more.
JWT Decoder
Decode the header and payload of a JWT token locally — inspect expiry and claims without sending data anywhere.
QR Code Decoder
Decode QR codes from an image or your camera and copy the result with one click.
Diagram Maker
Write Mermaid syntax and render flowcharts, sequence diagrams, UML, ER, topology and swimlane diagrams live.
Data Formatter
Format and validate YAML and XML, and convert between them and JSON — all in your browser.
Regex Visualizer
Turn a regular expression into a match diagram — an intuitive way to learn and debug complex regex.
Math calculation tools
Percentage Calculator
Various percentage calculation tools
Number Base Converter
Convert between binary, octal, decimal, hex
Prime Number Tools
Prime check, factorization, prime finder
BMI Calculator
Calculate Body Mass Index and assess healthy weight range
Compound Interest
Calculate compound interest growth with charts
Trigonometry Calculator
Calculate sine, cosine, tangent and other trig values in degrees or radians.
Geometry Solver
Compute area, perimeter and volume for common 2D and 3D shapes.
Sequence Generator
Generate arithmetic, geometric, Fibonacci and other common sequences.
Volume Calculator
Calculate volume of cuboid, sphere, cylinder and other solids.
Coordinate Plotter
Plot 2D function graphs on a canvas from a math expression.
Fraction Simplifier
Reduce fractions to lowest terms and show the greatest common divisor.
Standard Deviation Calculator
Compute mean, variance and standard deviation of a data set.
Math Functions
Factorial, permutations, GCD, LCM and primality.
Distribution Calculator
Compute probabilities and quantiles for normal and binomial distributions.
Color related tools
Color Picker
Color picker and converter tool
Gradient Generator
Generate CSS linear/radial gradient code
Color Palette Generator
Generate harmonious color palettes
Color Shades
Generate tints, shades, complementary and analogous colors
Color Blindness
Color blindness simulator and vision test
Complementary Color
Generate the complementary color and a scheme from an input color.
Color Format Converter
Convert colors between HEX, RGB and HSL formats.
Retro Film Palette
Generate a set of retro film-style color palettes.
Neon Palette
Generate high-saturation neon-style color palettes.
Morandi Palette
Generate low-saturation Morandi-style color palettes.
Text processing tools
Word Counter
Count words and characters in text
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text
Text Case Converter
Convert text to different cases
Morse Code
Text to Morse code converter with short/long number codes
Markdown Preview
Edit and preview Markdown rendering in real-time
Markdown Cheatsheet
Quick reference for common Markdown syntax
Special Symbols
Browse and copy common special symbols by category.
LED sign, neon text and custom text display tools
Countdown Timer
Online countdown timer with custom duration and alerts
Fullscreen Clock
Large digital clock with 12/24h format, multiple color themes, custom time offset. Fullscreen for maximum visibility.
Screensaver Timer
Custom screensaver countdown, multiple clock styles and fullscreen mode
Countdown Poster
Generate a countdown poster with a target date.
Nixie Clock
A retro nixie-tube style digital clock.
Flip Clock
A flip-animation style clock for your desk.
LED Sign Board
LED scrolling sign board with horizontal/vertical text, screen rotation and fullscreen.
Neon Sign Text
Simulate vintage neon tube lighting flicker damage
Liquid Text Morph
Text fuses separates and flows like mercury
Text 3D Origami
CSS3D text origami folding effect
Science simulation labs: radar, waves, optics, cells
Radar Station
Threat radar / Fish finder / Marine radar 3in1
Waves Lab
Fourier transform / Lissajous / Standing wave 3in1
Optics Lab
TIR / Polarized light / Newton rings and more
Cell Lab
Mitosis / Meiosis / Fertilization 3in1
Lonely Whale 52Hz
52Hz lonely whale, swimming with sound waves
Sextant
Navigation sextant, measure latitude and longitude
Eye Vision
Lens imaging simulation, myopia/hyperopia correction