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.
Online APK Analyzer
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
Android Backup Tool
Can be used to extract files from Android ADB backup files nad repack backup content into another backup file
Allows to check zipalignemnt of your APK files and generate zipaligned APKs, which are more memory efficient
Tool for extracting information from elf object files (native .so linux/Android libraries), like function names, dependencies, or strings.
APK X509 Certificate Info
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.
Android & Linux Partition Image Tool
Allows you to extract information from boot.img files, read-only mount sparse & raw ext4 image files, Linux ISO images, and browse and extract files inside of ext4 partitions
Tool that converts PNG files into ETC1 texture files, and can be used to generated textures for OpenGL ES on Android devices.
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.
Image Histogram Generator
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
Pano Stitch & Crop
Automatically stitches multiple overlapping photos into one larger panorama image and also allows to crop the final image to the preferred size
Images to video
Experimental tool that can create time-lapse video from multiple input images and also mux in audio into the final video file
PDF Merge & Split
Tool that can split and merge pdf files