No-nonsense tools for everyday dev tasks. JSON formatting, encoding, hashing, JWT inspection — all in one place, no login.
Send HTTP requests and test APIs with collections, auth, and response inspection in your browser.
Prettify, minify, and validate JSON. Tree view with collapsible nodes.
Encode text or decode Base64 strings instantly. Supports URL-safe Base64.
Generate v1, v4 UUIDs in bulk. Copy individually or all at once.
Decode and inspect JWT header, payload, and signature. Expiry check.
Build cron expressions visually. Human-readable schedule description.
Test regular expressions with live match highlighting and group capture.
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
Convert numbers between binary, octal, decimal, and hexadecimal. Any base 2–36.
Encode or decode URLs and query string parameters instantly.
Build cURL commands for GET, POST, PUT, DELETE with headers and body.
Generate production-ready Dockerfiles for Node, Python, Go, Java, and PHP.
Convert between HEX, RGB, HSL, and CSS color names. Visual preview.
Convert epoch timestamps with batch mode, timezones, and µs/ns support.
Minify HTML and CSS to reduce file size. Shows compression ratio.
Beautify or minify JavaScript with Terser, syntax highlighting, and download.
Create QR codes from URLs or text. Download PNG.
Generate Code128, EAN-13, UPC, and more. Download SVG or PNG.
Prettify HTML markup with readable indentation.
Format and beautify SQL queries. Supports MySQL, PostgreSQL, SQLite, BigQuery.
Format and beautify CSS stylesheets.
Create HS256 JWT tokens with custom claims.
Prettify XML documents with readable indentation.
Decompile .class bytecode to Java source. Class inspector, bytecode viewer.
Calculate network, broadcast, mask, and hosts from CIDR.
Encode and decode HTML entities. Convert special characters like & < >.
Build .gitignore from Node, Python, Go, and more presets.
Reference table for ASCII codes 0–127.
Generate bcrypt password hashes with adjustable cost factor.
Generate HMAC-SHA256 or HMAC-SHA512 signatures from message and key.
Generate cryptographically random API keys with custom format and prefix.
Encode text to \uXXXX escapes or decode back to plain text.
Evaluate JSONPath expressions against JSON documents.
Infer JSON Schema draft-07 from sample JSON data.
Bump, compare, and check npm semver ranges. Major, minor, patch, prerelease.
Parse browser, OS, device, and bot detection from any user-agent string.
Rounded corners, pills, circles, and organic shapes with live CSS output.
Multi-layer shadows with blur, spread, offset, and colour — copy CSS.
Visual polygons, circles, ellipses, and inset shapes with presets.
Linear, radial, and conic gradients with multiple colour stops.
Visual grid builder with columns, rows, gaps, and Tailwind output.
Visual flexbox playground — justify, align, direction, wrap, and code.
Send HTTP requests and test APIs with collections, auth, and response inspection in your browser.
Generate cryptographically random API keys with custom format and prefix.
Reference table for ASCII codes 0–127.
Generate Code128, EAN-13, UPC, and more. Download SVG or PNG.
Encode text or decode Base64 strings instantly. Supports URL-safe Base64.
Generate bcrypt password hashes with adjustable cost factor.
Rounded corners, pills, circles, and organic shapes with live CSS output.
Multi-layer shadows with blur, spread, offset, and colour — copy CSS.
Visual polygons, circles, ellipses, and inset shapes with presets.
Minify HTML and CSS to reduce file size. Shows compression ratio.
Convert between HEX, RGB, HSL, and CSS color names. Visual preview.
Build cron expressions visually. Human-readable schedule description.
Format and beautify CSS stylesheets.
Linear, radial, and conic gradients with multiple colour stops.
Visual grid builder with columns, rows, gaps, and Tailwind output.
Build cURL commands for GET, POST, PUT, DELETE with headers and body.
Generate production-ready Dockerfiles for Node, Python, Go, Java, and PHP.
Visual flexbox playground — justify, align, direction, wrap, and code.
Build .gitignore from Node, Python, Go, and more presets.
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
Generate HMAC-SHA256 or HMAC-SHA512 signatures from message and key.
Encode and decode HTML entities. Convert special characters like & < >.
Prettify HTML markup with readable indentation.
Calculate network, broadcast, mask, and hosts from CIDR.
Decompile .class bytecode to Java source. Class inspector, bytecode viewer.
Beautify or minify JavaScript with Terser, syntax highlighting, and download.
Prettify, minify, and validate JSON. Tree view with collapsible nodes.
Evaluate JSONPath expressions against JSON documents.
Infer JSON Schema draft-07 from sample JSON data.
Decode and inspect JWT header, payload, and signature. Expiry check.
Create HS256 JWT tokens with custom claims.
Convert numbers between binary, octal, decimal, and hexadecimal. Any base 2–36.
Create QR codes from URLs or text. Download PNG.
Test regular expressions with live match highlighting and group capture.
Bump, compare, and check npm semver ranges. Major, minor, patch, prerelease.
Format and beautify SQL queries. Supports MySQL, PostgreSQL, SQLite, BigQuery.
Encode text to \uXXXX escapes or decode back to plain text.
Convert epoch timestamps with batch mode, timezones, and µs/ns support.
Encode or decode URLs and query string parameters instantly.
Parse browser, OS, device, and bot detection from any user-agent string.
Generate v1, v4 UUIDs in bulk. Copy individually or all at once.
Prettify XML documents with readable indentation.