Percentage Change Calculator
Increase, decrease and the difference between two numbers.
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Molarity Calculator
Molarity, moles, mass or volume, plus dilutions.
Glitch Effect Generator
Add RGB shift, scan lines and datamosh artefacts.
Image Inverter
Invert colours to make a photographic negative.
Extract Text
Pull out the text between two markers, or everything matching a pattern.
Speaking Time Calculator
Turn a script into a spoken running time at your own pace.
CSS Minifier
Compress a stylesheet without touching what it means.
FAQ Schema Generator
Turn a list of questions into valid FAQPage JSON-LD.
AI Persona Generator
Create a persona for a chatbot or roleplay character, as a prompt or a character card.
IPv4 to IPv6 Converter
Convert an IPv4 address into every IPv6 form that carries it, and back.
XPath Tester
Run XPath expressions against your own XML and see every node that matches.
Weight Watcher Points Calculator
Points from nutrition labels, plus a daily allowance estimate.
Logarithm Calculator
Log to any base, natural log and antilog, with the change of base shown.
Srcset Generator
Generate responsive image sizes and the srcset markup.
Image Hash Generator
Generate cryptographic and perceptual hashes of an image.
Pixel Art Converter
Turn a photo into retro pixel art with a limited palette.
PNG Compressor
Cut PNG file size by reducing the colour palette.
Add Border to Image
Put a coloured border or frame around any photo.
Resize Image to KB
Hit an exact file size limit in KB or MB, automatically.
Remove Letters
Strip letters out and keep the numbers, symbols and structure.
Text Similarity Checker
Measure how similar two texts are as a percentage.
URL Extractor
Pull every web address out of a block of text.
Lowercase Letter Counter
Count lowercase letters and check the case balance of a text.
Function Schema Generator
Write valid tool-calling JSON schemas without hand-editing braces.
Headline Analyzer
Score a headline on length, structure, and the words that pull.
Keyword Grouper
Cluster a keyword list into groups by the words they share.
Percentage Calculator
Work out percentages, percentage change and reverse percentages.
Color Palette Generator
Generate complementary, analogous and triadic palettes from one colour.
Hash Generator
Produce SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text.
Mock JSON Generator
Describe a shape and get as many rows of matching JSON as you need.
MD5 Generator
Generate an MD5 hash of any text, with a straight answer about when not to.
JSONPath Tester
Run JSONPath expressions against a document and see every match live.
Income Tax Calculator
Estimate tax across progressive bands with your own rates.
Image to CSS Gradient
Turn a photo into a CSS gradient that echoes it.
Add Noise to Image
Add film grain or digital noise to an image.
Brightness and Contrast Editor
Fix exposure with brightness, contrast and gamma.
GIF to MP4 Converter
Convert an animated GIF to a far smaller video file.
Sprite Sheet Splitter
Cut a sprite sheet back into individual frames.
Expand Image Canvas
Grow the frame around a photo and choose where it sits.
Passport Photo Maker
Crop an ID photo to any country size and lay out a print sheet.
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