See it in action

How SynthKeys Works

Type the trigger #sig and press Space — SynthKeys removes the trigger and types your full signature.

Overview

What is SynthKeys?

SynthKeys is a lightweight text expander for Windows that makes repetitive typing disappear. You type a short trigger such as #sig followed by a space, Enter or a punctuation mark, and SynthKeys instantly replaces it with your full e-mail signature, a standard reply or a ready-made phrase.

It works in any app: e-mail clients, browsers, chat tools, office documents and code editors. Snippets can include today's date, the current time, the clipboard, questions it asks you while typing, and an automatic counter. Snippet chains let one trigger assemble a complete reply from several building blocks.

A modern editor with groups, search and a live preview keeps everything organised. SynthKeys runs quietly in the system tray, imports existing AutoHotkey hotstrings, and needs no scripting knowledge.

Key Features

Everything You Need, Nothing You Don't

Works everywhere

Triggers expand in every Windows app, either typed as keystrokes or pasted instantly (best for long signatures).

Smart placeholders

{date}, {time}, {clipboard}, {input:Name} (asks you for a value), and an auto-counting number {n:03}.

Snippet chains

Combine several snippets with {snippet:#trigger}; change a building block once and every chain stays in sync.

Chat-friendly line breaks

Choose Enter or Shift+Enter per snippet, so chat apps don't send early.

Modern editor

Groups, search, one-click placeholder chips, live preview and keyboard shortcuts.

Import and export

Bring in AutoHotkey hotstrings, save backups as SynthKeys JSON, or export as an AutoHotkey v2 script.

Sample library

Example snippets to start with; remove just the samples or everything (with automatic backup).

Fits into Windows

Tray icon with pause switch, Start with Windows, optional Start menu entry, single instance.

Fine control

Fire immediately or on an ending key, keep or drop the ending key, case-sensitive triggers, enable or disable each snippet.

Benefits

Why Teams Use SynthKeys

Save time every day. Signatures, greetings and standard answers take one short trigger instead of dozens of keystrokes.
Consistent communication. Everyone gets the same correct signature, wording and contact details, with no typos.
Fewer errors. Dates, numbering and repeated details are filled in automatically.
No learning curve. No scripts or code; set up a snippet in seconds in a visual editor.
Easy switch from AutoHotkey. Import existing hotstrings and keep working right away.
Private by design. Everything is stored locally on your PC; typed text is never logged or sent anywhere.
Lightweight. A 1.3 MB installer and a small tray app that stays out of your way.

Download SynthKeys

Version: 1.0.1
Size: 1.32 MB
Platform: Windows 64-bit

SynthKeys_1.0.1_x64-setup.exe · installs per user, no admin rights needed

The installer is not code-signed yet. Windows SmartScreen may ask you to confirm: "More info" → "Run anyway".

SHA-256 · checksum file

09BF6196EFEF40DAACC515F27C2FA818CE6602D6EB977EB0600CBA35B0E83C8E

Verify in PowerShell: Get-FileHash .\SynthKeys_1.0.1_x64-setup.exe -Algorithm SHA256

Download 1.0.1 Release notes

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SynthKeys