Home / Guides / CD vs DVD: what's the difference?
CD vs DVD: what's the difference?
The core difference is capacity: a CD holds about 700 MB, a DVD holds 4.7 GB (8.5 GB dual-layer) — roughly 6–12× more. CDs suit audio and small files; DVDs suit video, large backups and bootable installers. Any DVD writer also reads and writes CDs, so one drive covers both.
Knowing this helps you pick the right disc and settings the first time, so your burns read everywhere and last. When you're ready, cdBurner applies sensible defaults automatically.
Good to know
- Once the concept is clear, the burner handles the rest — open cdBurner and it picks sensible defaults for you.
- Not sure which disc to buy? Compare capacities in CD vs DVD vs Blu-ray.
Why cdBurner is different
Most burning apps are bloated installs full of upsells. cdBurner does the whole job from your browser — free, with no toolbars or trialware.
- 100% free — no trial, no watermark, no nag screens.
- Private — files are written locally and never uploaded to a server.
- No bloatware — one small signed helper, not a heavy install.
- Built on Windows' native IMAPI2 engine, so your discs read everywhere.
Frequently asked questions
Do I need to install software to burn discs?
Not a heavy program. cdBurner runs in your browser and only adds a tiny one-time burn agent so the page can reach your drive.
Which disc should I use?
It depends on size: a CD for audio and small jobs, a DVD for video and backups, a Blu-ray for large archives. See CD vs DVD vs Blu-ray.
Is cdBurner really free?
Yes — completely free and ad-supported. No trial, no watermark and no paid tier.