AI-powered Legal Summaries

LexiBrief: Legal Summarizer

Quickly transform complex legal documents* into insightful summaries using advanced NLP models. Choose from a variety of models to suit your needs, and get started in seconds.

* Currently optimized for English legal documents such as contracts, agreements, and case law. Working to support multilingual documents soon!

If you want to learn more about how this website came to be, read the paper.

Why LexiBrief

Instant Summaries

Get concise summaries of complex legal documents in seconds.

Advanced AI Models

Choose from state-of-the-art NLP models tailored for legal text.

Privacy First

Your documents are processed securely and never stored.

How It Works

1
Upload

Upload or paste your legal document.

2
AI Analysis

Our model analyzes key clauses and terms.

3
Get Summary

Receive a concise summary instantly.

4
Export & Share

Download or share your summary easily.

Backed by Research

LexiBrief is the applied companion to a master's thesis on transformer-based legal text summarization — every model choice here was benchmarked, not guessed.

4

Specialized models compared, from 1k to 16k token context windows

2

Independent AI judges (Claude & Gemini) scoring summaries blind, A/B/C/D

~90%

Run-to-run scoring consistency per judge, across repeated evaluation passes

3

Evaluation lenses: lexical overlap (ROUGE), semantic yield (BLANC), human + AI judgment

Read the full thesis for methodology and results →

A smoother workflow, end to end

Scroll or drag through the highlights, then jump straight into the summarizer.

Drag to explore

Secure processing
Secure
Privacy-aware processing

Summaries are generated on demand. No document retention in the UI-only preview.

Gavel representing legal documents
Legal
Built for long legal documents

Pick a model based on length. Longer-context models unlock larger agreements and case files.

Fast insights
Fast
From text to clarity

Paste text or upload a file—then generate a concise summary with one click.

Continue to summarizer

Your Legal Document

Live demo: this deployment serves illustrative placeholder summaries rather than full model inference. See the thesis for the real evaluation results.
Select AI Model

Pick a model based on document length and desired quality.

Tip: Longer models handle longer documents.

Models grey out when they can’t handle the token count.

Document Tokens: 0
Status: Ready
Character count: 0/64,000
Drop your file here or click to browse

Supports PDF, DOC, DOCX, and TXT files (Max 16MB)

Generating summary... This may take a moment.

Processing Progress
0%

Initializing...

Summary Results
Actions

Disclaimer

Not a substitute for professional legal advice. Summaries may omit critical details. Always consult a qualified attorney for legal matters.