Free Online Tools

Convert HTML entities back to plain text.

Preview rendered Markdown with basic sanitization.

Convert special characters to HTML entities.

Format and beautify JSON with a configurable indent.

Validate JSON and get readable error positions.

Strip whitespace to shrink JSON payloads.

Turn a JSON array of objects into CSV.

Parse CSV text into structured JSON.

Validate and pretty-print YAML documents.

Indent XML and catch basic structure errors.

Encode text to Base64.

Decode Base64 back to text.

Percent-encode text for safe URLs.

Decode percent-encoded URL text.

Inspect JWT header and payload locally.

SHA-256/384/512 hashes in the browser.

Generate one or many UUID v4 values.

Build random strings with custom character sets.

Count words, characters, lines and reading time.

Convert text between seven casing styles.

Test regular expressions against sample text.

Convert Unix timestamps to dates and back.

Measure the gap between two dates.

Convert a moment between time zones.

Searchable HTTP status code reference.

Searchable HTTP header reference.

Break a URL into its components.

Parse a user-agent string you paste in.

Estimate password strength locally.

Audit a site's HTTP security headers.

Parse and explain a robots.txt file.

Inspect a sitemap.xml for structure issues.

Check certificate validity for a domain.

Audit title, description and social tags.

Preview social cards from your metadata.

Draft title and meta description options.

Build a structured assessment report.

Build comparison tables from real CMS products.