Developer tools

Browse all tools in the "Developer tools" category and subcategories.

Encode & decode

Color Converter (web-toolbox.dev)

Free tool for converting between color code formats such as HEX, RGB, HSL, and HSV. Enter a color code to view all format values at once.

Validation

Color Contrast Checker (web-toolbox.dev)

Free tool for calculating the contrast ratio between two colors and checking whether they meet WCAG accessibility standards (AA and AAA). Useful for checking text and background color readability.

Developer tools

Color Code Converter (www.oh-benri-tools.com)

An online tool for converting between RGB (decimal), hexadecimal, RGBA, and CSS color formats. Instantly displays results in multiple formats in real time after input.

Encode & decode

Character Code Web (char.onl.jp)

A web tool that displays Unicode code points, UTF-8 byte sequences, and HTML character references for any input character. Useful for investigating character encoding issues and verifying encodings.

Developer tools

Case Style Converter (lazesoftware.com)

Converts between space-separated, camelCase, PascalCase, snake_case, and kebab-case naming conventions. A developer utility for quickly switching identifier styles.

Developer tools

Brand Color × Text Color Generator (toolpods.io)

Generate an accessible text color palette based on your brand colors. Provides color combinations with sufficient contrast ratios for readability.

Code generation

Box Shadow Generator (web-toolbox.dev)

Free tool for visually adjusting and generating CSS box-shadow values. Intuitively set offset, blur, spread, color, and inner/outer shadow, then copy the generated CSS code.

Code generation

Border Radius Generator (web-toolbox.dev)

Free tool for visually adjusting and generating CSS border-radius values. Set each corner individually and copy the generated CSS code directly.

Code generation

Bookmarklet Button (www.piliapp.com)

An online tool to create bookmarklet buttons from JavaScript code. Convert any JavaScript snippet into a draggable bookmarklet link for quick browser access.

Developer tools

Binary (Hex) Editor (www.oh-benri-tools.com)

An online tool for viewing and editing binary files in a browser. Load files by drag-and-drop, with support for byte addition, deletion, and hexadecimal editing. All processing is done in the browser.

Encode & decode

Base64 Encode/Decode (toolpods.io)

Encode and decode text to/from Base64. Supports UTF-8 and URL-safe Base64 formats.

Encode & decode

Base64 Encode / Decode Tool (lazesoftware.com)

Encodes and decodes text or files in Base64 format. Supports files up to 5MB and an optional RFC 2045 line-break setting (76 characters with CRLF).

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