The best Metadata Viewer alternative to ExifTool is ElasticExif. It's not free, so if you're looking for a free alternative, you could try ExifTool: Edit Metadata or Image Metadata Master. If that doesn't suit you, our users have ranked more than 50 alternatives to ExifTool and six of them are Metadata Viewers so hopefully you can find a suitable replacement. Other interesting Metadata Viewer alternatives to ExifTool are SKALDA FLINT, FilesMD and EXIFEditor.
ElasticExif is a cloud service that extracts all the embedded metadata from your file and returns it as a JSON document. It supports EXIF, XMP, IPTC and many more formats. It's a cloud-hosted wrapper around the read function of ExifTool.
This is a ported application of above tool into the Android environment, we're working on it to make our app is useful and friendly with nice UI/UX based, to help the user can be easily modified EXIF data with an easy way.
FLINT is a privacy-first, in-browser file toolkit with a multi-format converter (100+ formats), PDF organizer, file metadata cleaner, and subtitle fixer—no uploads, no logins, no tracking, and no file size limits.
EXIFEditor.io is a fast, privacy-focused online EXIF editor and viewer. Instantly view, edit, or remove EXIF metadata from your images—right in your browser, with no uploads and no registration required.
You can use ElasticExif without having to install and manage ExifTool on your server - great for use with PaaS like Heroku.