PunchGlue Compressor — Free Glue, Optical, & Bus Compressor VST3 Plugin

A free compressor VST plugin for perfect compression for your drums, vocals, mix and master bus, piano, guitar, or any other type of mix channel with the help of the PunchGlue Compressor. With five distinctive compression characteristics, this compressor can fulfil all your compression needs. Furthermore, it comes with 300+ high-quality, ready-to-use presets for different use cases. It does not matter what kind of track you are working on, you will find a preset for any and all channel types.
 
While most "free compressor VST" downloads are stripped-down demos, PunchGlue Compressor is not. It's a complete dynamics processor with soft-knee compression, a decoupled peak/RMS detector, external sidechain support, mid-side processing, lookahead, oversampling, and an interactive analyzer — the same feature set you'd expect to pay $50–$150 for.
 
Built-in character modes
Clean - Transparent, accurate gain reduction for surgical control. This one does exactly what you ask, no personality of its own. If you tell it "turn things down starting at this loudness," it does precisely that and nothing more. It is Good for vocals, the final mix, or when you want control but don't want the compressor to add any "flavor" of its own.
Classic - punchy VCA-style feedback compression for full mixes. Same honest worker as Clean, but people tend to push it a little harder and a little faster, giving it a punchier, more energetic feel; like the old-school hardware gear from decades ago. It is good for full band mixes, drums, anything that needs some extra push and energy.
Opto - This one is deliberately a bit lazy and smooth on purpose. Real vintage gear like this used a little light-sensitive part that physically couldn't react instantly, and got slower the longer it worked — so this mode copies that laid-back, "settling in" feeling instead of snapping instantly. Good for: vocals and bass, anywhere you want it to smooth things out without anyone noticing it's working.
Punch - Punch has a special trick: it lets the very first split-second of a hit through untouched — the "smack" of a kick drum or snare — and only starts turning the volume down right after that. That way you still get the compression's benefit, but you don't lose the exciting hit at the front of the sound. Good for: kick drums, snares, drum tracks — anything that needs to feel powerful and hit hard.
 
Bus : The Glue charecter is built for gluing multiple things together — like a whole drum kit, or your entire song — so they feel like one solid unit instead of separate pieces. It reacts quickly to short loud moments but eases off gently on longer, sustained loud sections, so it never sounds like it's obviously "pumping" in an unnatural way. Good for: your whole mix or drum group, when you want everything to feel like it belongs together.
 
 
What's inside
300+ factory presets across vocals, drums, bass, guitar, mix bus, mastering, and genre-specific categories
External sidechain input with HPF/LPF sidechain filtering
LF/HF bleed controls (bass and air pass through uncompressed)
Click-free lookahead
Up to 4x oversampling
Mid-side processing
Live dynamics analyzer, GR history, interactive compression curve, hover-to-learn tooltips
Stereo linking, auto-release, manual/auto makeup gain
 
Free. No catch. Completely free to download, includes an activation key for unlimited use, works in any VST3-compatible DAW on Windows.