Free Online Developer & SEO Tools
Practical tools for developers and SEO specialists, all running entirely in your browser. Generate valid schema.org structured data (JSON-LD) for articles, products, FAQs, recipes, and events, then copy the ready-to-paste script tag. Everything is built and validated locally — nothing you type is ever uploaded.
All Developer & SEO Tools
SVG to Base64
Convert SVG to base64, a data URI, an img tag or a CSS rule. Also shows the URL-encod…
SVG to CSS
Turn an SVG into a CSS background-image data URI, URL-encoded and ready to paste. Cov…
Schema Markup Generator
Generate valid schema.org JSON-LD for articles, products, FAQs, events and more. Copy…
Instagram Embed Generator
Paste your Instagram embed code and set the width, alignment and spacing with live pr…
Campaign URL Builder
Build GA4 campaign URLs with utm_source, utm_medium and utm_campaign. Live preview, c…
UTM Parser
Paste any tagged link to see its utm_source, medium and campaign, spot duplicate or m…
Bulk UTM Builder
Paste rows from a spreadsheet or CSV and tag hundreds of links with UTM parameters at…
Google Play URL Builder
Build a Google Play Store link with a UTM-encoded referrer so GA4 and Firebase attrib…
GA4 Channel Checker
Enter a UTM source, medium and campaign to see which GA4 default channel group the tr…