Most advice about law firm websites arrives with confident claims. Shorter forms convert better. One button color beats another. Put the phone number everywhere. Some of that advice may hold for your site and some may not, and the only way to know is to test it on your own visitors.
Testing a defense firm website has a catch. Compared with an online store, a local law firm gets few visitors and even fewer inquiries. A test that would finish in a weekend on a busy retail site could take months on yours. This guide covers how to run a fair test anyway, using the contact form as the example, and how to avoid the mistakes that make results meaningless.
Before you start a test
- Write down one clear hypothesis
- Change one thing at a time
- Decide in advance what counts as a win
- Track qualified inquiries, not raw form submissions
- Set a minimum run time before you look at results
Start with a hypothesis you can defend
A test should answer a specific question. “Will a shorter form get more inquiries?” is a start. A better version adds a reason: “Visitors on phones are abandoning the form at the case description field, so removing it should increase completed forms from mobile visitors without lowering lead quality.”
That second version tells you what to change, who it should affect and what to measure. It also lets you learn something if the test fails. If removing the field does not help, the abandonment had another cause, and you know where to look next.
Good hypotheses come from evidence on your own site. Session recordings, form analytics and intake notes all point to friction. If callers keep saying they could not tell whether you handle juvenile cases, that confusion is worth testing too.
Change one thing at a time
If you shorten the form, change the button and rewrite the heading all at once, you will not know which change mattered. On low-traffic sites the temptation to bundle changes is strong, since every test takes so long. Resist it for the elements you most want to understand.
There is one exception. If a page is clearly broken, such as a form that fails on certain phones, fix it. That is a repair, and it does not need an experiment.
Measure the outcome that pays the bills
For a defense firm, a form submission is only a step. A signed client is the goal. A change that doubles form fills while bringing in spam, the wrong practice areas or people outside your service area has not helped.
Work with your intake team to tag each inquiry. At minimum, record whether it came from a real potential client, whether the case type is one you handle and whether it led to a consultation. Then compare the versions on those tagged outcomes. This takes more effort than counting submissions, and it is the only way to see whether a change brought in better leads or just more noise.
Phone calls need tracking too. Many defense clients call instead of filling out a form, especially right after an arrest. Call tracking numbers can show whether a page change shifted people from calls to forms instead of adding new inquiries.
Split traffic properly, or run a careful before-and-after
A true A/B test shows version A to some visitors and version B to others during the same period. That controls for seasonality and outside events. Google Optimize, a free tool many small sites relied on, shut down on September 30, 2023, so firms now use other testing platforms or the testing features built into some website builders.
If a split test is not practical, a before-and-after comparison can still teach you something, with caveats. Run the old version for a set period, then the new one for the same length, and keep everything else steady, including ad budgets and intake hours. Watch for outside events. A local news story about DUI checkpoints, a holiday weekend or a shift in Google’s results can move your numbers more than the page change did.
Give the test enough time and data
Small numbers are noisy. If version B gets seven inquiries and version A gets five, that gap could easily be chance. Free sample size calculators can estimate how many visitors or conversions you need before a difference means something, and for a typical law firm site the answer is often larger than people expect.
Set a minimum run time before you start, and do not stop early because one version pulls ahead in the first week. Run full weeks so weekday and weekend patterns balance out. For many defense firms, a meaningful test of a single change runs for several weeks or longer. If the calculator says you would need a year, test a bigger change instead, one with a better chance of producing a difference you can actually detect.
Keep a testing log
Write down every test: the hypothesis, the dates, the versions, the traffic each received, the tagged outcomes and the decision you made. Over a year, the log becomes a record of what your own audience responds to. It also stops the firm from re-running the same idea every time someone new joins and suggests it.
Any change to wording on a legal services page still has to pass your state bar’s advertising rules. A version that wins a test by promising results is a version you cannot keep.
Questions about testing law firm websites
How much traffic do I need to run an A/B test?
It depends on how many inquiries you get and how large a difference you want to detect. Use a sample size calculator before starting. If the required run time stretches into many months, test bigger changes or use a careful before-and-after comparison.
What should a defense firm test first?
Start where visitors drop off most, often the contact form on mobile or the top section of your main practice pages. Problems that show up in your data or in intake calls make better first tests than generic tips.
Can I test more than one page at a time?
Yes, as long as the tests do not overlap. Running two tests on the same visitors during the same period can blur the results of both.
Do I need a developer to run tests?
Not always. Many testing tools and website builders let you create a variation without code. A developer helps when a change involves form logic, tracking or page speed.
This guide is part of SBD Marketing’s coverage of SEO experimentation and testing. SBD Marketing works only with criminal defense law firms.
SBD Marketing · info@sbdmarketing.agency · Book a call: sbdmarketing.agency/scheduling · Serving criminal defense law firms across the USA · sbdmarketing.agency
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