Dev & data
Format, encode, hash and compare. Small sharp tools for people who ship.
Dev
JSON formatter
Pretty print, minify and validate JSON.
Dev
Base64 encode & decode
Encode and decode Base64, UTF-8 safe.
Dev
URL encode & decode
Percent-encode and decode URLs and text.
Dev
HTML escape & unescape
Escape and unescape HTML entities.
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Slug generator
Titles into clean hyphenated URL slugs.
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UUID generator
Random v4 UUIDs, up to 100 at a time.
Dev
Hash generator
SHA-256, SHA-1 and SHA-512 hex digests.
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Unix timestamp converter
Epoch timestamps to dates and back.
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CSV to JSON converter
Turn CSV rows into a clean JSON array.
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Regex tester
Test regex patterns with live matches.
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Diff checker
Compare two texts, see added and removed lines.
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Markdown previewer
Preview markdown as you type.
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Number base converter
Binary, octal, decimal, hex and text.
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JWT decoder
Decode JWT header, payload and expiry.
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XML formatter
Pretty print, minify and check XML.
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CSS minifier
Strip CSS whitespace, see bytes saved.
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Cron expression translator
Cron schedules explained in English.
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URL parser
Split a URL into its decoded parts.
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SQL formatter
Tidy SQL with clauses on their own lines.
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Inline CSS converter
Turn style blocks into inline styles for email.
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Email link generator
Build correctly encoded mailto email links.
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UTM link generator
Build tagged campaign URLs for GA4.
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Dummy data generator
Fake but safe test records, CSV or JSON.
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Meta tag generator
Build title, OG and Twitter meta tags.
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Schema markup generator
Build JSON-LD structured data blocks.
Dev
Robots.txt generator
Build and download a robots.txt file.