LZW Compression Explained | Step-by-Step Text Compression Tutorial

Published: 08 September 2025
on channel: Baa Code Education
6,169
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Learn how LZW compression works step-by-step! In this tutorial, we’ll compress the text “Pikachu pinches Pachirisu” using the LZW algorithm, explaining every step clearly and visually. LZW is a powerful lossless data compression algorithm used in GIFs, TIFF files, and many file compression tools. By the end of this video, you’ll understand how LZW builds a dictionary, outputs codes, and why it becomes more efficient with longer, repetitive text.

👉 LZW Decompression video here :    • LZW Decompression Explained | Step-by-Step...  

📚 Complete Data Structures & Algorithms Playlist:    • Algorithm Video Collection  

Timestamps:
00:00 Introduction to LZW Compression
00:06 What is LZW Compression?
00:18 Initializing the dictionary
00:30 First steps of compression
01:09 Why we output codes this way (ABABC example)
02:35 Handling repeating patterns
03:10 Completing the compression process


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