Utilities & Online Tools

Convert structured text into HTML, office, and documentation formats

Share a small file with a chosen lifetime

Direct desktop delivery with interrupted-transfer recovery

Rebuild untrusted documents as flattened PDFs

Symbolic transformations for very large expressions

Convert completed manuscripts into Kindle book interiors

Email download links for large file batches

Android scientific calculation with symbolic and graphical tools

A simplified photovoltaic energy-production estimate

Hydraulics and environmental-engineering calculations

Generate and analyze network flow observations

Encode image frames into GIF animations

Map IP addresses to BGP origins and prefixes

Cutting plans for sheet, linear and roll materials

Review a sample email's authentication and spam signals

Render paginated HTML into PDF with a command-line workflow

Prepare corpora and examine vocabulary in context

Browser PDF editing, conversion, and document tools

Send, receive and automate files through Quatrix

Remove unwanted objects and prepare edited photos

Browser bandwidth tests with a self-hosting option

Capture image text and clean it for reuse

Isolate a person or object from a photo

Thermal-comfort models with visible environmental inputs