These free online tools allow you to extract various information about files and Android internals. Some of the tools are focused on photo & video processing.
APK Analyzer can extract information from compiled binary resources and AndroidManifest.xml files inside of your app's APK file
Allows you to decompile Android app binary code into human readable dalvik bytecode
This tool complements the APK Analyzer by allowing you to dump X509 Certificate signature info (like issuer, subject, validity period,..)
You can use this tool to create language-specific sources from you're protobuf definition files, or even to dump content of encoded messages.
Allows you to extract information from boot.img files, read-only mount sparse & raw ext4 image files, and browse and extract files inside of ext4 partitions
Shows information and mime type of various binary files and because it is completely client-based, you can also use it to display information about very large files (several GB)
Can create common types of hash (SHA1, SHA256, SHA512, MD5) from text and files. The files are not transferred to the server, so they can potentially be several gigabytes large.
Generates image histogram graphs from multiple images in batch and also allows to export histogram values into .csv file for analysis in your spreadsheet application
Automatically stitches multiple overlapping photos into one larger panorama image and also allows to crop the final image to the preferred size
Experimental tool that can create time-lapse video from multiple input images and also mux in audio into the final video file