Development Tools

Create linear and radial CSS gradients visually and copy the ready-to-use code.

Format, minify, and validate JSON directly in your browser. No installation, no sign-up required.

Encode and decode text to and from Base64 directly in the browser. Full support for Cyrillic and UTF-8.

Enter old URL → new URL pairs and get ready-to-use rules for Apache .htaccess. Supports 301, 302, and 307 redirects in two formats: Redirect and RewriteRule.

Encode or decode URLs and query strings. Supports encodeURIComponent for parameter values and encodeURI for full addresses.

Enter your text and background colors to get the contrast ratio and WCAG 2.1 compliance status (AA and AAA) for normal and large text.

Configure shadows visually — sliders for offset, blur, color, and opacity. Supports multiple shadow layers and comes with presets for popular styles.

Generate strong passwords using a cryptographically secure random generator. Configure length and character composition — get a strength rating in entropy bits.

Test regular expressions in the browser in real time. Match highlighting, captured groups list, flags g i m s — all in one tool.

Choose a base color and get a harmonious palette: monochromatic, analogous, complementary, or triadic. Copy HEX codes in one click.

Convert Unix timestamps to dates and back. Shows current time, supports seconds and milliseconds, outputs 8 formats simultaneously.

Convert a JSON array to a CSV table directly in your browser. Automatically detects columns, supports nested objects, delimiter selection, and file download.

Build a harmonious font-size system based on musical intervals. Choose a base size and a ratio — get CSS custom properties for your entire typographic scale.

Create custom shapes with 8-value CSS border-radius. Sliders, blob presets, live preview — and ready-to-copy CSS in one click.

Convert numbers between decimal, binary, hexadecimal, and octal. Displays bitwise representation and byte grouping.