Canonical: https://rom-weaver.com/docs/convert-to-rvz

# Compress ISO to RVZ online

Compress a GameCube or Wii ISO to RVZ with local browser compression. Use this RVZ converter without uploads or an account.

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## Table of contents

- [Add the ISO](<#add-the-iso>)
- [Create the RVZ](<#create-the-rvz>)
- [Check the result](<#check-the-result>)

<!-- END doctoc -->

## Add the ISO

1. Open [Compress](<https://rom-weaver.com/compress-files>).
2. Add one GameCube or Wii `.iso` file to **Inputs**.
3. Remove other files before choosing the output format.

Use a valid GameCube or Wii disc image. Renaming another console's image to `.iso` does not make it compatible with RVZ.

For a disc inside ZIP, 7z, or another supported container, add the container to Compress. Select the ISO, then select **Add N files**.

## Create the RVZ

1. In **Output**, choose **RVZ**.
2. Enter the output filename without its extension.
3. Keep the default compression settings, or open **Options** to change the level or block size.
4. Select **Compress** and wait for the result.
5. Select **Download** and save the `.rvz` file.

Block size defaults to 131072 bytes. Enter a power of two from 32768 to 1073741824 bytes. Examples include 32768, 65536, and 1048576. Invalid values show an error before compression starts.

If RVZ is unavailable, check that **Inputs** contains only one compatible disc image. Multiple files offer archive output instead. An `.iso` that Rom Weaver does not recognise as a GameCube or Wii disc, such as a DVD image, is not offered RVZ.

Keep the page open until compression and download finish. To stop compression, use the cancel control on the progress bar.

## Check the result

Open the RVZ in an emulator that supports RVZ for your console. Keep the original ISO until you check the result.

To compare the uncompressed bytes, [decompress the RVZ back to ISO](<https://rom-weaver.com/docs/convert-rvz-to-iso.md>). Compare that ISO's checksum with the original through [Identify](<https://rom-weaver.com/docs/identify-roms-browser.md>).

Keep enough free storage for the ISO and compressed output. The resulting file size depends on the disc contents and compression settings.

[Choosing a compression format](<https://rom-weaver.com/docs/compression-formats.md>) compares RVZ with CHD and Z3DS. For other discs, use [ISO or BIN/CUE to CHD](<https://rom-weaver.com/docs/convert-to-chd.md>).