ImageMagick
imagemagick.orgAutomate image transformations in batches
Automate image transformations in batches
Optimize images with a live before-and-after view
Apply repeatable edits across text files
Count text across batches of different file types
Windows video encoding with folder watching and track rules
Video conversion with preview, effects, and batch work
Mac media conversion with queues, presets, and track extraction
Add searchable text to scanned PDF documents
Build and reuse an adjustable stack of photo corrections
Windows capture and linear AVI processing
Merge exposures and tone-map HDR images
Apply selective color adjustments to RAW photos
Free Windows media conversion with track and subtitle controls
Batch conversion for office documents and ebooks
Batch-convert DWG and DXF files between versions
Bulk file conversion with folder input and output choices
Media conversion with original-and-output previews
Filter and batch-export DBF tables into modern data files
Convert music libraries while retaining tags and folder structure
Batch audio conversion with folder, tag, and sound-processing controls
Edit PDF metadata through a GUI or command line