Free Developer Tools
Free, open-source utilities for building faster, more accessible websites — made by SGBP — Singapore Build Partners.
Design & CSS
Colours, gradients, shadows, radius & grid — copy the CSS.
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DesignColor Palette Generator
Pick a base colour and get a matching palette of tints and shades.
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DesignBorder Radius Generator
Round each corner with sliders, preview live, and copy the CSS.
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DesignCSS Grid Generator
Set columns, rows and gap with sliders, preview live, and copy the CSS.
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DesignCSS Gradient Generator
Build linear or radial gradients with live preview, and copy the CSS.
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DesignCSS Box Shadow Generator
Set offset, blur, spread and colour with sliders, preview, and copy the CSS.
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DesignHex to RGB / RGBA Converter
Paste a hex colour and copy the rgb()/rgba() values with a live swatch.
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DesignDark Mode Toggle
A live light/dark switch plus the copy-ready CSS-variables and JS snippet.
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Developer Utilities
Encoders, validators, converters & everyday dev helpers.
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AccessibilityColor Contrast Checker
Check whether any text/background colour pair passes WCAG 2.2 AA and AAA.
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UtilitiesBase64 Encoder / Decoder
Convert text to Base64 and back, UTF-8 safe, entirely in your browser.
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UtilitiesJWT Decoder
Decode a JSON Web Token’s header and payload — nothing leaves your browser.
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UtilitiesEmail Validator
Check whether one or many email addresses are validly formatted.
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UtilitiesRegex Tester
Test a regular expression with live match highlighting and capture groups.
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PerformanceImage to WebP Converter
Convert PNG/JPG/GIF to WebP in your browser — nothing is uploaded.
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UtilitiesLorem Ipsum Generator
Make placeholder text by paragraphs, sentences or words, then copy it.
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UtilitiesMarkdown to HTML Converter
Paste Markdown and get clean semantic HTML plus a live preview.
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UtilitiesCron Expression Generator
Build a crontab schedule from dropdowns, with a plain-English preview.
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UtilitiesJSON Formatter & Validator
Paste JSON to pretty-print, minify, and validate it in your browser.
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PerformanceCSS Minifier
Strip comments and whitespace from CSS and see the bytes saved.
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SEO & Web
Schema, robots.txt & sitemaps to help pages get found.
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SEOSchema Markup Validator
Check your JSON-LD structured data is valid and uses schema.org correctly.
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SEOrobots.txt Generator
Build a valid robots.txt with allow/disallow rules and your sitemap.
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SEOXML Sitemap Generator
Paste your page URLs and get a valid sitemap.xml in your browser.
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Business & Local
Currency, discounts & Singapore essentials for owners.
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BusinessCurrency Converter
Convert USD to SGD and more using live reference exchange rates.
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BusinessDiscount & Percentage Calculator
Enter a price and a discount to see the final price and what you save.
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BusinessSingapore Public Holidays
The full list of SG public holidays for 2026 and 2027, with the weekdays.
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BusinessBarcode Generator
Type any text and download a scannable Code 128 barcode as PNG.
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BusinessQR Code Generator
Turn any URL or text into a scannable QR code and download it as PNG.
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