Archive Tools: guides & tutorials
Every CompressKits guide for Archive Tools — free, practical, and tied to the tool that does the job.
About the Archive Tools guides
This is the complete Archive Tools section of the Learning Center: 4 guides, newest first, pitched at beginner and intermediate level. Read end to end they run to roughly 29 minutes, though most people only need the one that matches the file in front of them.
Between them they answer the questions readers actually arrive with: What's the typical email attachment size limit? Why is my ZIP file the same size after compressing? Can I make a ZIP file smaller without losing files or quality?
Every guide here is tied to the tool that does the work — ZIP Compressor — so you can stop reading and run the file at any point. Those tools are free, need no account and add no watermark to what they produce.
The newest guide in this section is ZIP File Too Big to Email? Here's What Actually Works, last revised August 21, 2026. Each guide shows its own published and updated dates, so you can judge how current a number is before relying on it.