Open Source JavaScript Disk Space Analyzers

MangoDisk is a free, open-source disk cleaner for Windows and macOS. Find caches, large files, exact duplicates and app leftovers without digging through hidden folders. A treemap shows which folders take up the most space. Privacy Cleanup brings browser, application and system activity into one place. Review supported records by time range, select what to clear and check the impact before confirming. Clearing cookies can sign you out of websites. MangoDisk also includes app uninstall, startup management, system optimization, common repair tools and an operation history. Large-file scanning supports folder exclusions and a Spotlight-powered Quick Scan on macOS. Scans run locally. Review selected items before cleanup; nothing is deleted just by scanning. No signup or login is required.

diskover is a file system crawler and disk space usage software that uses Elasticsearch to index your file metadata. diskover crawls and indexes your files on a local computer or remote storage server over network mounts. diskover helps manage your storage by identifying old and unused files and give better insights into data change "hotfiles", file duplication "dupes" and wasted space. It is designed to help deal with managing large amounts of data growth and provide detailed storage analytics. See GitHub for requirements and instructions on installing.