Developer Tools

Generate a CSS linear gradient from two colors and an angle.

Generate CSS box-shadow values from simple inputs.

Generate CSS border-radius shorthand from one or more corner values.

Generate a CSS filter string from common values.

Generate basic JSON-LD WebApplication markup.

Generate FAQPage JSON-LD from question and answer pairs.

Generate BreadcrumbList JSON-LD from label and URL pairs.

Generate a canonical link tag to tell search engines your page's preferred URL.

Generate robots meta tags for index/follow options.

Convert .env key-value lines into a JSON object for configs and scripts.

Escape text into a valid JSON string value, handling quotes and control characters.

Convert basic Markdown headings, bold text, links, and paragraphs to HTML.

Extract one CSV column by its header name, one value per line.

Format simple SQL with line breaks before common clauses.

Convert labels into uppercase environment variable names.

Generate a Basic Authorization header from username and password.

Convert a simple curl GET command into a JavaScript fetch snippet.

Generate common HTML link tags for stylesheet, preload, canonical, and icons.

Generate a mailto link with subject and body.

Generate a WhatsApp click-to-chat link that opens a pre-filled message.

Remove UTM and common tracking parameters from URLs.

Convert an IPv4 address to decimal and binary.

Calculate usable IPv4 host counts from CIDR prefix length.

Estimate IPv4 network range from address and CIDR prefix.

Convert multiple Unix timestamps to ISO dates.

Convert a line-separated list into a JSON array.

Convert a JSON array into one item per line.

Count word frequency in pasted text and rank the most common words.

Count character frequency in pasted text.

Replace all exact matches in a text block locally.

Convert text to 8-bit binary byte values.

Convert 8-bit binary byte values back to text.

Encode or decode text with the ROT13 letter substitution.

Shift letters by a custom Caesar cipher amount.

Convert comma-separated values to tab-separated values.

Convert tab-separated values to comma-separated values.

Convert CSV rows into an HTML table snippet.

Convert label and URL lines into Markdown links.

Generate basic CORS headers for a known allowed origin.

Generate a tiny starter DNS zone file from a domain and IPv4 address.

Generate a practical .gitignore snippet for Node, macOS, logs, and Cloudflare projects.

Generate a compact .dockerignore starter file.

Escape special characters so text can be used literally in a regular expression.

Add sequential line numbers to pasted text for reference or debugging.

Collapse line breaks and extra whitespace in pasted text into clean single spaces.

Reverse the character order of any text, locally in your browser.

Find items in the first list that are missing from the second list.

Find items that appear in both of two pasted lists.

Merge two pasted lists into one, removing duplicate entries.

Find words that repeat more than once in a block of pasted text.

Extract all unique object keys from JSON.

Flatten nested JSON into flat dot-path keys for easier diffing or export.

Encode or decode Base64URL strings locally.

Convert text to hexadecimal character codes.

Convert hexadecimal character codes back to text.

Extract all http/https URLs found in a block of pasted text.

Extract email addresses from pasted text.

Remove HTML tags and keep readable text.

Search common DNS record types and what they are used for.

Search common HTTP request and response headers.