Password Strength

Send any HTTP method with custom headers and body; inspect the full response.

Encode UTF-8 text as Base64, or decode Base64 to UTF-8 text.

Percent-encode arbitrary text for safe inclusion in URLs, or decode percent-encoded text.

Escape HTML special characters as entities (& < > "), or decode entities to plain text.

Pretty-print, minify, or sort-key JSON.

Fetch a URL and inspect response headers, status code, and redirect chain.

Compute a unified diff between two blocks of text (line-based).

Send a CORS preflight + GET to a URL and inspect Access-Control-* headers; flags common misconfigurations.

Break a URL into its components (scheme, host, port, path, query params, fragment) or assemble one from parts.

Test a regular expression against a string — shows all matches, captured groups, and highlights matches inline.

Translate a cron expression into next 8 scheduled run times (UTC). Supports 5-field and 6-field (with seconds) syntax.

Convert between HEX, RGB, and HSL color notations with a preview swatch.

Fetch a URL and preview how it appears as a Google result, Twitter card, and Open Graph share.

Given width, height, or a W:H ratio, calculate the missing dimension and show the simplified ratio.

Fetch an image URL and convert it to a Base64 data URI for embedding directly in CSS or HTML.

Load a URL in headless Chromium, extract every computed CSS color, and list them as a sortable palette with swatches.

Load a URL in headless Chromium and identify the CSS frameworks, JS frameworks, analytics, CDNs, CMS, and hosting platform used to build the site.

RFC 5322 syntax check on an email address, plus an MX-record existence probe on its domain.

Count characters, words, lines, paragraphs, plus an estimated reading time.

Fetch a site's robots.txt, list its rule groups + sitemaps, and validate whether a specific path is allowed for a given user agent.