Developer tools

Prettify, validate, and minify JSON. Highlights syntax errors in real time.

Encode text or files to Base64 format. Essential for embedding assets in code.

Decode Base64 strings back to plain text or binary data.

Encode special characters in a URL string to their percent-encoded equivalents.

Decode percent-encoded URL strings back to readable text.

Generate v4 UUIDs instantly. Copy single IDs or bulk-generate a list.

Convert Unix timestamps to readable dates and back. Supports ms and seconds.

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text. Uses the browser's built-in Crypto API — no uploads.

Test regular expressions against input text with live match highlighting and capture group display.

Compare two blocks of text and highlight additions, deletions, and unchanged lines side by side.

Decode and inspect JSON Web Token headers, payloads, and expiration claims. Nothing is sent to a server.

Build cron schedules with a visual form and get an instant plain-English description of when the job will run.

Encode special characters to HTML entities and decode HTML entities back to plain text.

Convert Markdown to HTML with a live preview. Paste markdown, see it rendered, copy the raw HTML.

Upload any file to see its MIME type, file size, extension, and last modified date.

Build a robots.txt file with user-agent rules, disallowed paths, and sitemap URL — ready to download.

Generate clean 301 or 302 redirect rules for Apache .htaccess from a list of old and new URLs.

Generate a QR code with custom foreground and background colours. Download as PNG.

Upload an image or enter initials to generate a full favicon package: 16px, 32px, 48px, and 180px Apple touch icon. Download as ZIP.

Build CSS box-shadow values visually with sliders for offset, blur, spread, colour, and opacity. Live preview.

Generate the CSS for a frosted-glass UI card with adjustable blur, opacity, and border. Live preview.

Preview any URL in an iframe at mobile, tablet, laptop, and desktop widths without leaving the page.

Check your page title length and see a live Google SERP snippet preview.

Check your meta description length and see a live Google SERP snippet preview.

Build UTM-tagged URLs for campaign tracking. Source, medium, campaign, term, content.

Generate valid JSON-LD schema for Article, FAQ, Product, Local Business, Breadcrumb, and more.

Create linear, radial, and conic CSS gradients with colour stops and live preview. Developer-focused.

Visual flexbox builder with live preview. Controls for flex-direction, justify-content, align-items, gap.

Define columns and rows visually, control gap and areas, live preview, copy CSS output.

Convert JSON to CSV. Switch to CSV to JSON on the same page without navigating away.

Convert CSV to JSON. Switch to JSON to CSV on the same page without navigating away.

Beautify and format minified or messy HTML with proper indentation. Copy output.

Format SQL queries with consistent indentation and capitalised keywords. MySQL, PostgreSQL, SQLite.