Who these tools are for
They suit marketers tagging ads and newsletters, small businesses adding a WhatsApp or email button to a website, agencies building QR codes for print campaigns, and developers who need to encode a value for a query string. Each tool encodes special characters for you, so links built with Hindi text, the ₹ sign or an ampersand in a campaign name do not break.
Which tool to use when
| You want to… | Use | Output looks like |
|---|---|---|
| See which ad, email or post sent a visitor | UTM builder | …?utm_source=facebook&utm_medium=paid-social&utm_campaign=diwali-sale |
| Let people start a WhatsApp chat in one tap | WhatsApp link generator | https://wa.me/919876543210?text=Hi |
| Open a prefilled email draft | Email link generator | mailto:sales@example.com?subject=Quote |
| Encode or read a messy, % -filled value | URL encoder and decoder | summer%20sale%20%26%20offers |
Combining them
A typical campaign uses more than one. A real-estate developer running Meta ads tags the landing-page URL with the UTM builder so GA4 credits Paid Social, then adds a WhatsApp button on that page whose prefilled message carries a reference code such as "Ref: S150-META", because WhatsApp chats do not carry UTM data. If a tagged link looks wrong in a report, paste it into the URL decoder to read it.
Three rules for every link
- Test before publishing on a phone and a desktop, after any redirect or link shortener.
- Keep personal data out of URLs. Names, phone numbers and emails in a link end up in logs and analytics.
- Use one naming convention for sources, mediums and reference codes, shared with everyone who builds links.
- Prefer short, readable messages. A prefilled WhatsApp text or email subject of one line is more likely to be sent unchanged, which keeps your reference code intact.
For the measurement side, read the UTM parameters guide and WhatsApp lead tracking with GA4 and CRM. Everything runs in your browser — nothing you type is sent to our servers.
Frequently asked questions
What is the difference between a UTM link and a WhatsApp link?
A UTM link points to a web page and adds tags that tell Google Analytics where the visit came from. A WhatsApp link opens a chat with a phone number and can prefill a message. They do different jobs, so campaigns often use both: a UTM-tagged landing page with a WhatsApp button on it.
Can I track clicks on WhatsApp and mailto links?
You can track the click on your own website, for example as a GA4 event triggered on the button, but neither WhatsApp nor email apps report back which link started a conversation. Put a short reference code in the prefilled message or subject so your team can match each conversation to its campaign.
Do I need to encode text before using these tools?
No. The UTM, WhatsApp and email tools encode spaces, symbols and non-English text automatically. Use the URL encoder and decoder when you are building a link by hand, adding a value to some other query string, or trying to read an encoded link from a report.