Developer

Color, base64, cron, hash, regex · 34 tools

Data 1

Data Storage Converter Convert digital storage sizes between bytes, KB, MB, GB, and TB using decimal (SI, 1000-based) units.

Encoding 21

Base32 Encoder / Decoder Encode and decode Base32 (RFC 4648) — the TOTP-secret alphabet, UTF-8 safe, in-browser.

Base64 Encoder / Decoder Base64 encoding and decoding with proper UTF-8 handling and the URL-safe alphabet — private, in-browser.

Bitwise Calculator Bitwise operations with aligned binary columns — see AND, OR, XOR, NOT, and shifts work bit by bit, in C/JS 32-bit semantics.

CSV to JSON Converter Convert CSV to JSON with proper quoted-field handling, header detection, and type inference — all in your browser.

CSV to Markdown Table Turn CSV into a Markdown table with alignment and quote-aware parsing — paste straight into GitHub or docs.

Gzip Compressor Compress and decompress text with gzip/deflate using the browser's built-in CompressionStream — see the ratio, copy the Base64.

HTML Entity Encoder / Decoder Escape HTML special characters or decode entities back to text — safe, inert parsing, all in-browser.

IEEE 754 Floating Point Converter Break any number into IEEE 754 sign/exponent/mantissa bits and reveal the exact stored value — see why 0.1 isn't really 0.1.

JSON Formatter Format, minify, and validate JSON with line-and-column error reporting — private, in-browser, safe for real data.

JSON to CSV Converter Convert JSON arrays to RFC 4180 CSV with union headers and proper quoting — copy or download, all in your browser.

JSON to YAML Converter Convert JSON to YAML and back — exact serialization, common-subset YAML parsing, all in-browser.

JWT Decoder Decode JWT headers and claims with humanized exp/iat times and an expiry badge — the token never leaves your browser.

Markdown to HTML Converter Convert Markdown to clean HTML source with safe escaping and web-only links — copy-ready, in-browser.

Morse Code Translator Convert text to Morse and back, then play it aloud at standard timing with adjustable WPM — learn it by ear.

Number Base Converter Convert between binary, decimal, hex, and octal with live editing in any field, two's-complement readouts, and exact 64-bit math.

QR Code Generator Create a QR code from any link or text in your browser. Custom colors, error-correction levels, and PNG or SVG download. Nothing is uploaded — fully private.

Regex Tester Test regular expressions with live highlighting, capture groups, and find-and-replace — in-browser, instant.

Text Diff Checker Line-by-line text comparison with color-coded additions and removals — private, instant, in-browser.

URL Encoder / Decoder Encode and decode URL percent-encoding with component and full-URL modes — live, private, in-browser.

URL Parser Parse URLs into protocol, host, path, and decoded query parameters — instant, using the browser's own URL engine.

UUID Generator Generate one or hundreds of version-4 UUIDs with cryptographic randomness — copy as a list, all in your browser.

Encryption 2

AES Text Encryption Encrypt and decrypt text with AES-256-GCM and a passphrase — native browser crypto, nothing transmitted, authenticated against tampering.

HMAC Generator Generate HMAC signatures (SHA-1/256/384/512) in hex and Base64 — the webhook and API request-signing mechanism, in-browser.

Reference 2

Common MIME Types (IANA Media Types) Media types for common file extensions, checked against the IANA registry, including the obsolete JavaScript type and the JPEG one that does not exist.

HTTP Header Field Names Every HTTP field name IANA has registered, with its status, RFC 8941 structured type and defining document. 259 fields, from permanent to obsoleted.

Standards & Codes 5

ASCII Table Printable ASCII characters 32–126 with decimal and hex codes — filterable.

HTTP Status Code Reference All HTTP status codes that matter: 2xx, 3xx redirects, 4xx client errors, 5xx server errors — meanings and gotchas, filterable.

Password Strength Calculator Password entropy in bits and honest brute-force time from length and character mix — nothing typed or sent.

Rate Limit Calculator Convert requests per second to per-minute, hour, day, and month — API capacity planning in one glance.

Uptime SLA Calculator Convert SLA uptime percentages (99.9, 99.99, five nines) into allowed downtime per year, month, and week.

Validators 3

Credit Card Validator Validate card numbers with the Luhn checksum and brand detection — fully in-browser, nothing transmitted, built for payment-form testing.

Email Validator Check email address syntax with an itemized rule list and common-typo suggestions — private, in-browser, honestly scoped.

IBAN Validator Validate IBANs with the mod-97 checksum and country length rules — in-browser, bank details never transmitted.