---
description: |
  The `packer fix` command updates backward incompatible templates for the running version of Packer. 
page_title: packer fix command reference
---

# `packer fix` command reference


The `packer fix` command takes a template and finds backward incompatible
parts of it and brings it up to date so it can be used with the latest version
of Packer. After you update to a new Packer release, you should run the fix
command to make sure your templates work with the new release.

-> **JSON template-only command**: You cannot use the `packer fix` command to update HCL2 templates.

The fix command will output the changed template to standard out, so you should
redirect standard out using standard OS-specific techniques if you want to save it
to a file. For example, on Linux systems, you may want to do this:

```shell-session
$ packer fix old.json > new.json
```

If fixing fails for any reason, the fix command will exit with a non-zero exit
status. Error messages appear on standard error, so if you're redirecting
output, you'll still see error messages.

-> **Even when Packer fix doesn't do anything** to the template, the
template will be outputted to standard out. Things such as configuration key
ordering and indentation may be changed. The output format however, is
pretty-printed for human readability.

The full list of fixes that the fix command performs is visible in the help
output, which can be seen via `packer fix -h`.

## Options

- `-validate=false` - Disables validation of the fixed template. True by
  default.