SMS Link Tracking: How to Use Short Links in SMS

How much of the 160 characters does a link use?

Every character of the link counts, so a long URL can turn a one-part message into two. A plain GSM-7 message holds 160 characters, or 153 per part when it is split into several parts; a Unicode message holds 70, or 67 per part. See GSM-7, Unicode SMS and concatenated SMS.

The short link saves 61 characters. These examples were counted against the limits:

The third row fits one part here, but leaves almost no room for copy, and a longer campaign name would push it past 160. The last row shows that one emoji changes the encoding and halves the limit. Check your final text in the SMS character counter, and read our guide to SMS character limits and Unicode for other scripts.

How do you set up SMS link tracking step by step?

1. Choose the short domain and point it at your redirect service.
2. Write the destination URL with UTM parameters, using an agreed naming pattern.
3. Create one short link per variant, such as per offer, per audience segment or per message version.
4. Add the link to the message and check the character count and the encoding.
5. Test on real handsets on the main operators, including that the link opens, redirects and is not blocked.
6. Send, then read shortener clicks, analytics sessions and conversions side by side.
7. Archive the result so the next campaign starts from the winning variant.

For personalised sends, use a unique link per recipient only if you need per-person data and have a lawful basis to collect it; otherwise a link per segment is enough. Our campaigns platform supports personalised and scheduled sends, and delivery statuses reach your system through webhooks.

What should you measure?

Measure the chain from delivery to conversion and watch for drop-offs at each link in it.

A worked example with synthetic numbers: a campaign delivers 10,000 messages and records 800 unique clicks, so CTR is 800 / 10,000, or 8%. Analytics shows 720 sessions, because some visitors leave before the page loads. 60 of them buy, so the landing conversion rate is 60 / 720, about 8.3%, and the conversion rate per delivered SMS is 60 / 10,000, or 0.6%. Run the same maths on two variants and you can compare them fairly. See conversion attribution for how to credit a sale to a message.

Why are click numbers sometimes inflated?

Some clicks come from software, not people. Security scanners, link-preview features and bots may fetch a link automatically when a message arrives. This can lift the click count on short links, especially within seconds of delivery.

Ways to handle it:

• compare shortener clicks with analytics sessions; a large gap suggests automated traffic;
• look at the time between delivery and click, and treat clicks that arrive almost instantly with caution;
• use conversions as the final judge, because bots rarely buy or sign up;
• apply bot filtering where your analytics or shortener tool offers it.

What are the privacy and safety rules for tracked links?

Tell people you measure clicks, keep what you collect to what you need and respect opt-outs. Click tracking records data about the person who clicked, and under laws such as the GDPR (Regulation (EU) 2016/679) data that identifies a person, directly or indirectly, is personal data. That means a lawful basis, transparency and rights of access and objection. Our guide to opt-in consent across channels and the opt-in consent generator help with the wording. Rules vary by country, so confirm them with your counsel.

On safety:

• Show your brand in the message and use a domain people can recognise, because unfamiliar links are what phishing looks like.
• Do not ask for passwords, card numbers or one-time codes on a page reached by an SMS link.
• Where a regulator controls links directly, follow it. India's whitelisting rule is one example; do not assume other markets have the same rule or that they do not. Check the destination market's rules in our SMS marketing rules by country.

What are the common mistakes?

• A long raw URL in the message. It uses most of the 160 characters and can split the message.
• A shared shortener for everything. You inherit other senders' reputation.
• No UTM naming standard. Reports fill with near-duplicate values.
• Counting clicks as success. Conversions are the goal, and scanner clicks inflate the click count.
• Links to pages that do not work on mobile. Most SMS clicks come from phones.
• No mention of tracking in the consent text. Tell people what you measure.
• Skipping tests. A link can pass your phone and still be blocked on another operator.

How OmniChannels.ai helps

OmniChannels.ai, powered by BroadNet, sends SMS over direct operator connectivity with delivery reports, personalised and scheduled campaigns and webhook statuses, so you can line up delivery data with your click and conversion data. We help you register sender IDs where markets require them and can advise on link practices for each destination. See the SMS channel and book a demo to talk through your campaign.