All Tools
Free online developer tools — fast, private, and running in your browser.
Data(11)
JSON Formatter
Format, validate, and minify JSON data instantly.
Timestamp Converter
Convert Unix timestamps to human-readable dates.
UUID Generator
Generate UUID v1 (time-based), v4 (random), or v7 (sortable) — up to 100 at once.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
JSON ↔ CSV Converter
Convert JSON arrays to CSV and CSV back to JSON. Supports custom delimiters, nested object flattening, and type coercion.
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON instantly. Includes a YAML syntax validator with line-number error reporting.
SQL Formatter
Format and beautify SQL queries with configurable keyword casing, indentation, and dialect support for MySQL, PostgreSQL, T-SQL, BigQuery, Snowflake, and 15+ more.
JSON Validator
Validate and pretty-print JSON with instant feedback. Syntax errors are shown with exact line and column numbers and live stats.
XML Formatter & Validator
Pretty-print minified XML with configurable indentation and validate XML well-formedness. Supports SOAP, RSS, SVG, and any XML document.
XML ↔ JSON Converter
Convert XML to JSON and JSON back to XML. Attributes, nested elements, and arrays are all handled correctly — runs entirely in your browser.
CSV Formatter & Converter
Format, lint, and convert CSV or TSV data. Auto-detect delimiters, trim whitespace, skip empty rows, and export as clean JSON.
Encoding(5)
Base64 Encode / Decode
Encode or decode Base64 strings online.
URL Encode / Decode
Encode or decode URL components.
Hash Generator
Generate SHA-1, SHA-256, SHA-512 hashes from text.
HTML Entity Encode / Decode
Encode special characters to HTML entities and decode them back.
Morse Code Translator
Encode text to Morse code and decode Morse code back to text. Full ITU reference table with click-to-insert. 100% offline.
Security(5)
JWT Toolkit
Decode, sign, and verify JSON Web Tokens. Inspect header and payload, generate signed tokens with HS256/HS384/HS512, and verify signatures. 100% client-side.
Password Generator
Generate strong, secure random passwords with custom length and character rules.
HMAC Generator
Generate HMAC-SHA256/512 signatures in hex, base64, or base64url. Supports UTF-8, hex, and base64 inputs. 100% client-side.
AES Encrypt / Decrypt
Encrypt and decrypt text with AES-GCM or AES-CBC using a passphrase. 128/192/256-bit keys, PBKDF2 key derivation. 100% client-side.
ROT13 / Caesar Cipher
Apply ROT13, Caesar shift, ROT47, or Atbash cipher to any text. Bidirectional with adjustable shift.
Text(5)
Case Converter
Convert text between camelCase, snake_case, and more.
Text Diff Checker
Compare two texts and highlight the differences.
Lorem Ipsum Generator
Generate placeholder text for your designs.
Word Counter
Count words, characters, sentences, and estimate reading time.
Markdown Preview
Write and preview Markdown in real time with GitHub Flavored Markdown support.
API(1)
Image(12)
PNG to ICO Converter
Convert PNG/JPG/SVG to a multi-size .ico favicon file.
Image to Base64
Convert PNG, JPG, GIF, WebP, or SVG to a Base64 Data URL for embedding in HTML or CSS.
QR Code Generator
Generate QR codes for URLs, text, WiFi, and contacts. Customize colors and download as PNG.
Image Cropper
Crop images in your browser with drag handles and preset aspect ratios (1:1, 4:3, 16:9…). Export as PNG, JPEG, or WebP — 100% client-side.
Image Converter
Convert PNG, JPEG, WebP, GIF, BMP, and SVG images to any format. Batch convert multiple files, tune quality, and download a ZIP — all client-side.
AVIF to PNG
Convert AVIF images to lossless PNG in your browser. Batch convert multiple files and download them individually or as a ZIP.
Favicon Generator
Generate a complete favicon package from any image: favicon.ico, all standard PNG sizes, Apple Touch Icon, Android Chrome icons, HTML head tags, and a web manifest.
Blur Image
Apply Gaussian blur, pixelate (mosaic/censor), or frosted-glass effects to any image. Live preview with adjustable intensity. Export as PNG, JPEG, or WebP.
Image Metadata Viewer
Inspect EXIF, IPTC, and GPS metadata embedded in JPEG, TIFF, PNG, and WebP images. View camera settings, location, timestamps, and export everything as JSON.
Pixelate Image
Turn any photo into pixel art with adjustable block size. Fine-tune colours with hue shift, saturation, brightness, contrast, and a custom colour tint. Export as PNG, JPEG, or WebP.
Image Resizer
Resize and compress images in your browser. Set pixel dimensions, lock aspect ratio, and export as PNG, JPEG, or WebP.
SVG to PNG
Convert SVG vector graphics to PNG, JPEG, or WebP. Set size, scale factor (@1x–@4x), and background color. Runs entirely in your browser.
Network(9)
URL Parser
Break any URL into protocol, hostname, path, query params, and hash. Or build a URL from parts.
My IP Address
Find your public IP address, location, ISP, and timezone instantly.
DNS Lookup
Query A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, and CAA records for any domain in real time via DNS-over-HTTPS.
HTTP Headers Inspector
Fetch HTTP response headers for any URL. Get a security score based on HSTS, CSP, X-Frame-Options and other headers.
WHOIS Lookup
Look up WHOIS records for any domain: registrar, registration dates, name servers, and raw WHOIS data.
IP Geolocation
Look up city, country, timezone, ISP, and ASN for any IP address. Leave blank to look up your own IP.
IP Subnet Calculator
Calculate subnet details from a CIDR block: network, broadcast, host range, subnet mask, and usable host count.
HTTP Ping & Latency
Test HTTP response time and status for any URL. Track latency across multiple pings with a mini bar chart.
HTTP Request Debugger
Send HTTP requests with custom method, headers, query params, and body. Inspect response status, headers, and body — your browser-based API client.
CSS(4)
Color Converter
Convert colors between HEX, RGB, HSL, OKLCH, HSV, and CMYK. Live preview swatch, per-channel editor, and WCAG contrast checker.
CSS Gradient Generator
Build linear, radial, and conic CSS gradients with live preview. Add multiple color stops and copy the CSS.
CSS Box Shadow Generator
Create multi-layer CSS box-shadows with live preview. Control offset, blur, spread, color, opacity, and inset.
CSS Unit Converter
Convert between CSS units: px, rem, em, pt, vw, vh, cm, mm, in, and %. Configure base font size and viewport.
Dev(5)
Regex Tester
Test and debug regular expressions in real time.
Cron Expression Builder
Build and validate cron expressions visually. Field-by-field editor with human-readable descriptions and next scheduled run times.
.env File Parser
Parse and inspect .env files. View key-value pairs with type detection, find duplicates, and mask sensitive values.
File Diff Checker
Compare two text or code files side-by-side with added/deleted line highlighting. Runs entirely in your browser.
Crontab Timezone Converter
Convert cron schedule expressions between timezones. See next run times and get a plain-English description.