Developer Tools

Phone Number Formatter & Validator Single Number Bulk Formatter Country Code Reference Phone Number Country United States (+1) Canada (+1) United Kingdom (+44) Japan (+81) Germany (+49) France (+33) Australia (+61) South Korea (+82) China (+86) India (+91) Brazil (+55) Mexico (+52) Italy (+39) Spain (+34) Netherlands (+31) Singapore (+65) Hong Kong (+852) Taiwan (+886) New Zealand (+64) South Africa (+27) International Copy National Copy E.164 Copy RFC 3966 Copy Digits Only Copy Country for all numbers United States (+1) Canada (+1) United Kingdom (+44) Japan (+81) Germany (+49) France (+33) Australia (+61) South Korea (+82) China (+86) India (+91) Brazil (+55) Mexico (+52) Italy (+39) Spain (+34) Netherlands (+31) Singapore (+65) Hong Kong (+852) Taiwan (+886) New Zealand (+64) South Africa (+27) Paste phone numbers (one per line) Format All Clear Copy Results Country dial codes, trunk prefixes, and typical number lengths for reference. ...

Generate QR codes instantly in your browser — no uploads, no accounts, no tracking. Supports URLs, plain text, WiFi credentials, and email links. URL Text WiFi Email Website URL Plain Text Network Name (SSID) Password Encryption WPA/WPA2 WEP None (open) To Address Subject Body (optional) Appearance Size 300px Foreground #000000 Background #ffffff Preview & Download Enter content above to generate a QR code. ...

QR Code Generator Text or URL 0 / 2953 characters Output Size 200 × 200 px 300 × 300 px 400 × 400 px 500 × 500 px Error Correction L — 7% M — 15% Q — 25% H — 30% Foreground Color Background Color Generate QR Code Clear Generated QR Code Download PNG Copy to Clipboard History No QR codes generated yet. Clear History Generate barcodes → Barcode Generator ...

Regex Interactive Cheatsheet Click "Try it" on any row to load the pattern into the live tester below. ...

Test regular expressions instantly in your browser. Paste your pattern, choose flags, and see matches highlighted in real time — no sign-up, no server, no external libraries. ...

Enter a regular expression to get an instant visual breakdown of every token, highlight all matches in your test string, and extract capture groups — no sign-up, no server, no external libraries. ...

ROT13 / Caesar Cipher ROT13 Cipher Mode ROT13 ROT5 ROT47 Caesar Direction Encode Decode View Normal Brute Force Shift 13 Input Output Copy Output Brute Force — All 25 Caesar Shifts ShiftOutput How It Works ROT13 rotates each letter by 13 positions in the alphabet. Since the English alphabet has 26 letters, ROT13 is its own inverse — applying it twice returns the original text. It is commonly used to obscure spoilers or puzzle answers online. ...

Paste your SQL and get it back formatted with proper indentation, uppercased keywords, and optional syntax highlighting — all running locally in your browser. No data is ever sent to a server. SQL Formatter Format SQL Minify Clear Syntax highlight Tab size: 2 spaces 4 spaces Input SQL Formatted Output Copy Related: Format JSON — JSON Formatter ...

Paste your Tailwind CSS utility classes and get them sorted in the recommended order — layout first, effects last. Supports single class strings or multi-element HTML snippets. Related tools: CSS Variables Generator · CSS Media Query Generator ...

Original Text Modified Text Compare ⇆ Swap Clear Diff Result Copy Added Removed Related tools: ...