: Open the file in the newer version, go to File > Export , and choose InDesign Markup (IDML) .
Adobe InDesign has a built-in feature to export files to older versions. Here's how: how to convert indesign file to older version free
Select from the "Save as type" dropdown. Save the file. Open that IDML file in your older version of InDesign. ☁️ Using Adobe Creative Cloud Sync : Open the file in the newer version,
| Your Newer Version | Your Older Version | Best Free Method | Success Rate | | :--- | :--- | :--- | :--- | | InDesign 2023-2025 | InDesign CC 2019-2022 | Native IDML Export | 95% | | InDesign 2023-2025 | InDesign CS6 (2012) | IDML Export + Font remap | 80% | | InDesign 2021 | InDesign CS4 | IDML Export | 70% (Effects lost) | | Any Version | InDesign CS3 or older | (No IDML support) | 0% | | InDesign File | No InDesign at all | Online Converters → PDF | 50% | Save the file