Document & Media
PDF Tools
Merge, split, compress and convert PDF files.
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OCR
Extract text from images and scanned documents.
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HEIC Converter
Convert Apple HEIC images to JPEG or PNG.
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Image Cropper
Crop, resize and export images in the browser.
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SVG → PNG
Render vector graphics to raster images at any resolution.
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Excel Summary
Summarise spreadsheet data quickly.
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Utilities
Color Tools
Convert, pick and manipulate colour values.
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Hash Tools
Generate MD5, SHA-1, SHA-256 and more.
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QR Generator
Create QR codes for URLs, text, or contact info.
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Contact Card
Generate vCard files for digital business cards.
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Diff Checker
Compare two blocks of text side by side.
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Morse Code
Translate text to and from Morse code.
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Lottery Picker
Random number picker for lottery entries.
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Science & Maths
Resistance Calc
Decode resistor colour bands and calculate values.
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Capacitance Calc
Work out capacitor values from markings.
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Terminal Velocity
Simulate free-fall and terminal velocity physics.
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Math Tools
Algebra helpers, unit conversion, and more.
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Base Calculator
Convert between binary, decimal, hex and octal.
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Base Counter
Count and display numbers in any base.
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Physics Sims
Multiple interactive physics simulations.
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About
What is this?
This is a personal collection of browser-based tools I built because I kept reaching for them and didn't want to rely on third-party sites. Everything runs client-side — your files and data never leave your machine.
Built with vanilla HTML, CSS, and JavaScript. No frameworks, no trackers, no nonsense. Feel free to fork or adapt anything you find useful.