Colour Contrast Checker
Check text and background colours against WCAG contrast requirements and discover accessible alternatives.
Use toolA useful tool for the task ahead
Practical tools for websites, marketing, images, files, privacy and support.
Explore the collection by category. Each tool explains how it works and how it handles your information.
Check website behaviour, accessibility considerations, technical configuration and launch readiness.
Check text and background colours against WCAG contrast requirements and discover accessible alternatives.
Use toolWork through practical website launch checks and export a handover report locally in your browser.
Use toolInspect public HTTP redirect chains and status codes with bounded server-side HEAD requests.
Use toolInspect MX, SPF and DMARC records and check a chosen DKIM selector.
Use toolInspect HTTP status, HTTPS, redirects, selected response headers and server-side timing for a public website.
Use toolPrepare links, previews and sharing assets for your website and campaigns.
Preview page titles and descriptions in approximate desktop and mobile search results before publishing.
Use toolPreview social link cards and prepare Open Graph and X Card metadata before publishing.
Use toolInspect URL structure and remove common tracking parameters locally in your browser.
Use toolGenerate custom QR codes for text and URLs locally, then download PNG or SVG.
Use toolCreate correctly formatted campaign URLs locally in your browser.
Use toolPrepare, convert, inspect and protect images and files.
Remove supported AI metadata from images directly in your browser.
Use toolResize and optimise supported images locally in your browser, without uploading them.
Use toolHide sensitive information in screenshots using permanent redaction blocks, directly in your browser.
Use toolConvert JPEG, PNG and WebP images locally in your browser, with honest format and transparency handling.
Use toolExtract a practical colour palette from an image locally in your browser.
Use toolCrop and prepare social-media images locally using common aspect ratios.
Use toolGenerate browser favicons and app icons locally from an image.
Use toolCalculate and compare SHA-256 file checksums locally, including large files.
Use toolCreate secure credentials and prepare useful support information.
See and copy useful browser, device and display information for technical support.
Use toolGenerate secure random passwords and memorable passphrases locally in your browser.
Use toolAssemble a clear support report with optional browser details and a reviewed screenshot, then export it locally.
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