The details, without the brochure voice.

Velocity

Diffy

PLATFORMS

Windows10 and 11 · x64 · MSIX from the Microsoft Store

Linuxx86_64 · snap, in progress

macOS · ARM64Not built

ShellsGUI only. The core is a standalone library so a CLI can be added later; it has not been

STACK

CoreRust · headless, no UI dependencies

ShellTauri 2 with a React and TypeScript frontend

StateLocal SQLite in WAL mode, on your machine only

SecretsOS keychain only — never the database, logs or config

BACKENDS

ProtocolsFTP · FTPS (explicit and implicit) · SFTP over SSH

AuthenticationPassword · SSH private key · SSH certificate · agent (Pageant, ssh-agent) · keyboard-interactive for 2FA

Cloud storageNot built. No S3, Azure, GCS, Drive, Dropbox, Box, OneDrive or WebDAV

AbstractionEvery backend implements one async RemoteFs trait; capability differences travel as flags, not conditionals

ProgressPushed to the UI on a broadcast channel — the frontend never polls and never opens a socket

RUNTIME

PlatformWindows · a single portable Diffy.exe

InstallNone. Runs from any folder, including a USB stick

Built withPython 3.11+ and PyQt6; everything else is the standard library

NetworkNo cloud, no telemetry, no outbound connections

DIFF ENGINE

Algorithmshistogram (default) · patience · classic

WhitespaceIgnore none, trailing, or all

EncodingsUTF-8, UTF-16 and anything else it can decode; CRLF and LF preserved on save

AnchorsManual alignment pairs; regions above and below re-diff independently

FORMATS

HighlightingXML and VXML · PHP · JavaScript and TypeScript · C# · Python · SQL · CSS · JSON

Imagespng · jpg · jpeg · bmp · gif · webp · tif · tiff · ico. SVG is treated as text, because it is markup

ReaderRendered Markdown and HTML · native PDF viewing

ExportsUnified patch · self-contained HTML report

RedIcon

Desktop utilities for developers, designers and the people who keep their servers running.

redicon.pk · Islamabad, Pakistan

PRODUCTS

Velocity Diffy Pricing Download

RESOURCES

COMPANY