Toolbin, the Online Developer Toolbox … and for muggles too.

Encrypt and decrypt text with AES-GCM using a password, in your browser.

Generate API keys with a custom prefix (sk_live_, pk_…), cryptographically secure.

Generate a bcrypt hash of a password and verify a password against a hash, in your browser.

Perform bitwise operations (AND, OR, XOR, NOT, shifts) on two numbers, in your browser.

Encrypt and decrypt with the Caesar, ROT13 and Vigenère ciphers (educational).

Compute the CRC32 checksum of a text (hexadecimal).

Encode and decode text to and from Base32 (RFC 4648) in your browser.

Encode and decode text in Base58 (Bitcoin, IPFS) right in your browser.

Encode and decode text to and from Base64 (UTF-8), right in your browser.

Encode and decode Base64URL (URL-safe variant used in JWT), in your browser.

Convert forum BBCode into clean, sanitized HTML, right in your browser.

Convert text to binary (ASCII/UTF-8) and back.

Convert HTML into React JSX (class → className, camelCase attributes, style object, comments).

Format, indent, minify and validate JSON. 100% client-side.

Minify JSON (strip whitespace and line breaks) to reduce its size.

Generate JSDoc typedefs (@typedef) from JSON, to document and type your JS code.

Generate a TypeScript interface from a JSON object, including nested types.

Check whether your JSON is valid and pinpoint the first error precisely.

Generate the HTTP Authorization: Basic header from a username and password.

Generate the HTTP Authorization: Bearer header and extract a token from a header.

Run JavaScript, TypeScript, Python or PHP and see the result instantly, 100% in your browser.

Generate the tints and shades of a color for your palette, in your browser.

Break down a Cookie or Set-Cookie header into readable key/value pairs.

Generate CORS headers (Access-Control-Allow-*) for your server.

Compute Unix permissions (octal ↔ symbolic): read, write, execute.

Convert an IPv4 address range (start–end) into the minimal CIDR blocks.

Convert an IPv4 address to a decimal integer, binary and hexadecimal.

Calculate an IPv4 / CIDR subnet: mask, range, broadcast and host count.

Expand an IPv6 address to full form and compress it (::).

Look up a network port number and its associated service (common ports reference), in your browser.

Searchable ASCII reference table (decimal, hex, octal, character), in your browser.

Turn text into large ASCII letters (figlet banner style), right in your browser.

Bold the start of each word to read faster (bionic reading), in your browser.

Convert text to camelCase, snake_case, kebab-case, CONSTANT_CASE, and more.

Count characters, words, sentences, lines and paragraphs of pasted text in real time, in your browser.

Turn a slug (my-url-title) into readable text (My Url Title), right in your browser.

Calculate an aspect ratio (16:9…) and derive a missing proportional dimension.

Generate a barcode (EAN-13, Code128, UPC) from a value, downloadable, in your browser.

Decode a data URI or Base64 into a viewable, downloadable image, in your browser.

Create CSS rounded corners (border-radius) with a live preview and copy-ready code.

Generate a CSS box-shadow with a live preview and copy-ready code.

Make a background color (green/blue screen) transparent and export a PNG, in your browser.

Calculate the exact age from a birth date (years, months, days), in your browser.

Validate a card number with the Luhn algorithm and detect the network.

Change a CSV’s column separator (comma, semicolon, tab, pipe), in your browser.

Select and export one or more columns from a CSV, right in your browser.

Convert a CSV into a ready-to-paste HTML table (with header), right in your browser.

Convert a CSV into SQL INSERT statements (custom table name), in your browser.