ISO Extend intelligently splits oversized ISO images across multiple CD-R, DVD-R, or Blu‑ray discs — with automatic reassembly. No more hunting for expensive dual‑layer media.
One-time purchase. $9.99 — No subscriptions.
Smart splitting, native burning, and hassle-free reassembly.
Automatically detects your disc type and calculates exactly how many discs you need. Supports CD-R, DVD-R, DVD-R DL, BD-R, and custom sizes.
Burn directly to physical discs using Windows' built-in IMAPI2 engine. No third-party burning software needed.
Sequential fill algorithm keeps directory structures together. Large files are automatically split into parts with seamless reassembly.
Detects El Torito BIOS and UEFI boot records. Your Windows, Linux, or custom bootable ISOs stay bootable after reassembly.
Every split includes a batch script that walks you through inserting each disc and automatically rebuilds the original file structure.
Windows 11, Linux distros, game ISOs, data backups — if it's an ISO, ISO Extend can split it.
Three steps from oversized ISO to a stack of burnable discs.
Select any ISO file. ISO Extend mounts it, scans every file, detects boot records, and shows you the full breakdown.
Pick CD-R, DVD-R, BD-R, or enter a custom size. See exactly how many discs you need before committing.
Hit start. ISO Extend creates disc folders with a reassembly script, then optionally burns each one directly to disc.
Run the included script on any PC. Insert discs when prompted — the original file structure is rebuilt automatically.
From vintage CD-Rs to modern Blu-ray — ISO Extend handles them all.
No subscriptions. No hidden fees. Pay once, use forever.