A partner drops a stack of twelve cases on your desk Monday morning. "Read these by Wednesday — I need a memo on the circuit split." Each opinion averages forty pages. That is four hundred eighty pages of judicial prose: procedural histories, factual recitations, multi-part analyses, concurrences, and dissents. Two days. No extensions.
This is not unusual. This is Tuesday in litigation.
Westlaw puts the entire corpus of American law at your fingertips — over forty thousand court opinions added every year, plus statutes, regulations, administrative decisions, and an enormous library of secondary sources. The platform is extraordinary. But every piece of content it delivers is text on a screen, and the sheer volume of reading required in legal practice will wear down even the most disciplined researcher.
There is no audio option. No "listen to this opinion" button. No text-to-speech toggle. Westlaw was built for reading, not listening. Until now.
Why Legal Research Desperately Needs TTS
Legal professionals read more than almost any other profession. A 2024 survey by the American Bar Association found that attorneys spend an average of 3.2 hours per day reading — case law, statutes, briefs, contracts, correspondence, and internal memos. For litigators and appellate attorneys, that number climbs to 4.5 hours.
Law students face an even more extreme version of this problem. During the school year, the typical 1L reads 300 to 500 pages per week of casebook material. During bar exam prep, that number can double. And much of this reading happens on Westlaw, where students access the full text of assigned cases, review headnotes and key numbers, and read secondary sources to fill gaps in their understanding.
The problem is not that the material is boring. Legal analysis is intellectually engaging. The problem is the delivery format. Staring at a screen for four hours taxes your eyes, your posture, and your concentration. By hour three, your reading speed drops. Your comprehension drops faster. You start re-reading paragraphs. You lose your place in a dissent's argument structure. The cognitive load of dense legal prose, combined with the physical strain of prolonged screen reading, creates a ceiling on how much you can absorb in a day.
Text-to-speech breaks through that ceiling. It converts screen time into listening time. It lets you absorb case law during your commute, review statutes while walking to the courthouse, and re-read a critical holding during lunch without opening your laptop. It adds a second modality — auditory processing — to what was previously a purely visual task.
How CastReader Works With Westlaw
CastReader is a free Chrome and Edge extension that adds text-to-speech to any web page. On Westlaw, the workflow is simple:
- Open any case, statute, regulation, or secondary source on Westlaw
- Click the CastReader icon in your toolbar
- Audio begins immediately with natural AI voices
- Each paragraph highlights on the page as it is spoken
- A floating player bar provides pause, resume, speed control, and paragraph-level navigation
No account required. No setup wizard. No subscription. Free.
CastReader extracts the substantive text from the page — the court's opinion, the statutory language, the article content — and reads it sequentially. Westlaw's interface elements — navigation menus, key number links, citing references panels, result list sidebars — are filtered out so you hear only the content that matters.
The paragraph highlighting feature is particularly valuable for legal text. When you are listening to a twenty-page analysis of whether a statute survives strict scrutiny, the highlighted paragraph keeps you oriented in the argument structure. You always know exactly where you are in the opinion. If a passage requires closer attention, click on that paragraph to replay it.
Use Cases for Legal Professionals
Case Review and Brief Preparation
The most immediate use case is listening to cases while doing other work. Open the twelve opinions your partner assigned, queue the first one, and listen while you organize your case file, format your memo outline, or draft the introductory section. By the time you sit down to write the substantive analysis, you have already absorbed the holdings and key facts from multiple opinions — through your ears rather than your eyes.
For appellate attorneys, this workflow extends to reviewing the record on appeal. Listen to the lower court's opinion while reviewing trial exhibits. Listen to the appellee's brief while outlining your reply. The dual-channel approach — visual attention on one task, auditory attention on another — lets you process more material in less time.
Bar Exam Preparation
Bar exam prep on Westlaw typically involves reading hundreds of case summaries, reviewing statutory outlines, and studying secondary source explanations of black-letter law. CastReader turns this into a multi-modal study system.
During focused study blocks, read the Westlaw content with CastReader playing simultaneously at 1.0x to 1.2x. This bimodal processing — eyes and ears receiving the same information — has been shown to improve retention. During commutes and exercise, listen to review passes at 1.5x. Material you read that morning gets a second exposure through a different sensory channel.
For MBE (Multistate Bar Examination) subjects where you need to memorize elements and holdings across dozens of cases, the repetition that audio enables is invaluable. You are not finding extra hours in the day. You are converting existing dead time — commuting, walking, cleaning — into study time.
If you are also using UWorld for MBE practice, CastReader works there too. One extension covers both your question bank and your primary research platform.
Billable Hour Efficiency
For practicing attorneys at firms that bill hourly, every minute spent on client research is a minute billed. CastReader does not reduce the time you spend on research — it makes that time more flexible. Listen to cases during your commute (billable, if your firm allows transit research time). Listen while you eat lunch at your desk. Listen while you wait for a hearing to start.
The practical result is that research hours can overlap with time that would otherwise be non-billable. An associate who listens to three cases during a one-hour round-trip commute has effectively added an hour of billable research to the day without adding an hour to the office.
Setting Up CastReader for Westlaw
Step 1: Install CastReader
- Chrome: Chrome Web Store
- Edge: Edge Add-ons
Step 2: Log into Westlaw and open any case, statute, or secondary source.
Step 3: Click the CastReader icon in your toolbar. Audio begins within seconds. The current paragraph highlights on the page.
Step 4: Adjust speed. For unfamiliar holdings or statutory language, 0.8x to 1.0x. For factual backgrounds of cases you have already briefed, 1.3x to 1.5x. For review passes on well-known precedent, 1.5x to 2.0x.
Step 5: Use paragraph navigation. Click any paragraph on the page to jump directly to it. This is essential for long opinions — skip the procedural history and jump straight to the analysis section.
Sixty seconds of setup. Every Westlaw page now has a play button.
Tips for Different Content Types
Court Opinions
Long opinions benefit most from CastReader. Start with the syllabus or headnotes at normal speed to get the holding and key issues. Then listen to the full opinion at 1.0x to 1.3x. On review passes, increase to 1.5x. Use paragraph navigation to skip concurrences or dissents that are not relevant to your research question, or to replay a critical passage in the majority opinion.
Statutes and Regulations
Statutory language is precise by design — every word matters. Use slower speeds (0.8x to 1.0x) for statutory text. Listening to a statute read aloud often reveals structural relationships between clauses that are easy to miss when reading silently. Subsections, exceptions, and cross-references become more apparent when processed auditorily.
Law Reviews and Secondary Sources
Westlaw's secondary source library includes law review articles, treatises, and practice guides. These tend to be less dense than case law but significantly longer. Use CastReader at 1.3x to 1.5x for secondary sources — the prose style is more conversational than judicial opinions, and faster speeds work well without sacrificing comprehension.
Headnotes and Key Numbers
Westlaw's editorial headnotes are concise summaries of legal points in a case. Listening to all headnotes for a case at normal speed gives you a rapid overview before diving into the full opinion. This is an efficient way to triage a long list of search results — listen to headnotes to decide which cases deserve a full read.
CastReader Across Your Legal Research Stack
Westlaw is rarely the only platform in a legal professional's workflow. Most attorneys and law students also use LexisNexis for cross-referencing, Google Scholar for quick case lookups, HeinOnline for historical legal materials, and PDF documents for briefs, contracts, and filed court documents.
CastReader works on all of them. The same extension, the same one-click workflow. There is no need to learn different tools for different platforms. Install once, and every web-based legal resource gets audio.
For law students who supplement Westlaw research with online courses — whether Coursera legal studies programs or bar prep platforms — CastReader covers those too. One extension for your entire study ecosystem.
The Reading Load Is Not Going Down
Legal research is trending toward more text, not less. Courts publish more opinions every year. Regulations grow longer and more complex. The secondary source literature expands continuously. AI-assisted legal research tools help you find relevant authorities faster, but you still need to read them. Finding a case in three seconds instead of thirty does not help if the opinion takes two hours to read.
Text-to-speech does not replace reading. It augments it. It converts rigid screen time into flexible listening time. It adds a second cognitive channel for processing complex arguments. It turns dead time into research time.
Four hundred eighty pages by Wednesday. With CastReader on Westlaw, you can listen to half of those during commutes, walks, and meals — and arrive at your desk Wednesday morning with a clear understanding of the circuit split and a memo outline half written.
Ready to listen to Westlaw? Install CastReader — free, no signup, works on any web page in seconds. Also works on LexisNexis, PDFs, and every other legal research platform.
