Lập trình

Serialize forms on the active page to JSON and copy or download the data.

Format, minify, and validate JSON locally with path lookup.

Inspect CSS media queries on the page — match state, viewport, prefers-*, breakpoints, and export.

Trace redirect chains with hop timing, host/scheme change alerts, history, and JSON export.

Local HTTP client with headers, auth, presets, timing, JSON pretty-print, and cURL export.

Extract and inspect JSON-LD and microdata schema markup on the active page.

Pick an element on the page and copy a unique CSS selector for it.

Test XPath on the page — recipes, click-to-pick, scroll-to-match, saved queries, and copy paths.

Test, highlight, and replace with regex — recipes, flags, groups, and saved patterns locally.

Base64 and URL encode/decode tools in a simple textarea workspace.

Compare two text blocks with a simple colored line diff.

Design CSS gradients with multiple stops, linear/radial/conic modes, presets, favorites, and page preview.

Hash text locally with Web Crypto SHA-256, SHA-384, and SHA-512.

Decode JWT header and payload JSON locally without signature verification.

Pick two elements and compare their key computed CSS styles side by side.

Query pasted JSON with simple JSONPath-style paths and copy the matches.

Generate UUID v4, ULID-like, and Nano-like identifiers in bulk with local history.

Hover to inspect computed CSS, click to copy. Local only. Chrome and Edge.

Custom CSS and hide elements per site. Local only. Chrome and Edge.

Pick page elements and export JSON or CSV locally. Chrome and Edge.

List CSS custom properties used on the active page and copy their values.

Highlight multiple search terms on the page with different colors.

Calculate CSS selector specificity and compare two selectors.

Convert between simple YAML and JSON locally in the toolbar.