FastCompressor Feature Index

Engineered for raw speed.
Zero cloud uploads. Zero limits.

Explore the complete offline compression toolkit — from GPU video encoding to background folder daemons and AI MCP servers.

Download Free for DesktopLifetime Pro Pricing
Media & Compression

Media & Compression Controls

Pixel-level fidelity, target file size presets, and integrated video controls without leaving the app.

Target File Size Engine

Hit exact upload limits with one click

Never get hit with “Your file is too large to send” again. FastCompressor automatically calculates the optimal compression to match strict size limits without trial-and-error.

Discord Preset: Guaranteed < 25 MB for free tier chat attachments
Email Preset: Guaranteed < 10 MB for Gmail, Outlook, & Apple Mail
Custom Target Size Slider: Set any target from 500 KB to 100 MB
In-App Video Trimmer

Trim video clips & strip audio before compressing

Cut out unwanted footage, trim start/end points, and downscale 4K footage in a single unified step without opening heavy video editing software.

Precision Scrubbing: Millisecond-accurate start/end trim controls
Audio Track Stripping: Mute or strip silent audio to save ~10% size
1-Click Downscaling: Scale 4K/1440p to 1080p or 720p with crisp text
Visual Proof & Quality

Interactive side-by-side quality comparison

Inspect compressed photos and video frames before saving. Compare fine textures, sharp text, and dark shadows to verify zero visible blur.

Real-time split comparison for both image and video frames
Pixel-level zoom to inspect typography, edges, and gradients
Math-exact lossless mode available for archival assets
Queue Overrides & Renamer

Granular per-file control & bulk renamer

Need one file converted to WebP, another downscaled to 1080p, and a third kept strictly lossless? FastCompressor allows per-item setting overrides inside the same queue.

Per-Item Overrides: Customize format, resolution, and quality per file
Batch Renaming: Suffixes, prefixes, and find-and-replace patterns
Size Protection: “Only save if smaller” prevents file bloat
Workflow & Automation

Workflow & Desktop Automation

Turn compression into an invisible background superpower that handles folders, clipboards, and cloud files automatically.

Background Watcher Daemon

Automatic background folder watch mode

Set it and forget it. Designate folders like Downloads, OBS Recordings, or Desktop Screenshots. FastCompressor silently compresses every new file the moment it lands.

Monitors directories with ultra-low CPU background daemon
Real-time desktop toast notifications with exact space savings
Zero-latency background processing with auto-purge
High-Throughput Batch Engine

Massive batch queue with zero memory leaks

Unlike online converters that freeze browser tabs after 20 files, FastCompressor handles tens of thousands of files with constant, predictable memory usage.

Uncapped file size & resolution limits (up to 32,000+ px)
Parallel worker threads scale with your CPU core count
Handles mixed formats (RAW, 4K video, PDF, PNG, GIF) simultaneously
Desktop Quick Actions

Floating dropzone & clipboard quick compress

Compress without ever switching windows. Drag files onto the always-on-top floating pill or press a global shortcut to compress copied clipboard images.

Floating Pill Dropzone: Compact always-on-top target for instant drops
Clipboard Quick Compress: Optimize copied screenshots (Cmd+C / Ctrl+C)
Menu Bar & Tray Integration: Lightning-fast access without main window
Cloud Files On-Demand

Seamless iCloud, OneDrive & Dropbox sync

Other tools crash when you drag in online-only files. FastCompressor automatically identifies cloud placeholder stubs, temporarily hydrates them, compresses locally, and cleans up temp files instantly.

Multi-Cloud Support
Works with iCloud Drive, Dropbox Smart Sync, and OneDrive
Crash Prevention
Zero 0-byte corrupted exports or app freezes on stubs
Cache Management
Automatic cache purge immediately frees system disk storage
Developer & System

Developer & System Tools

Integrate with AI agents via Model Context Protocol, run background automations, and compress files locally without cloud uploads.

Model Context Protocol (MCP)

Autonomous AI compression in Cursor & Claude

FastCompressor exposes a local MCP server. Let AI developer tools (Cursor, Windsurf, Claude Desktop, Antigravity) audit and compress repository media assets automatically via natural language prompts.

Native Tool Bridge
Native JSON-RPC MCP bridge for AI coding assistants
Repo Automation
Audit and compress full asset directories via prompt commands
Simple Setup
1-click JSON snippet configuration for Claude & Cursor
Changelog

Actively maintained

Shipped regularly. Every release makes the engine faster or smarter.

All releases
NEW

v3.1.0 - Universal macOS Build, Floating Dropzone & Performance Engine

1 day ago
v3.0.0

v3.0.0 - Multi-Core Offline Engine, Faster Batch Processing & Stability

2 weeks ago
v2.0.9

v2.0.9 - Cloud Files Support & Stability Improvements

2 weeks ago
v2.0.8

v2.0.8 - Smart Optimization & Bug Fixes

3 weeks ago
v2.0.7

v2.0.7 - Metadata Preservation & Stability Fixes

3 weeks ago
v2.0.6

v2.0.6 - Bug Fixes & Improvements

1 month ago
Frequently Asked Questions

Everything you need to know about FastCompressor

No. FastCompressor is a 100% offline, native desktop application. All compression and video encoding runs directly on your computer's CPU and GPU. Your files never touch the internet, making it fully compliant with strict NDAs, HIPAA, and GDPR standards.

You've been sending client files to strangers' servers. Stop.

FastCompressor keeps everything on your machine - your files never leave your computer. And it costs less than lunch. Price: $19, once, forever.

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