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 JSON-RPC MCP bridge for AI coding assistants
Audit and compress full asset directories via prompt commands
1-click JSON snippet configuration for Claude, Cursor, and Windsurf
Comprehensive Media Support

Every format you work with. Supported natively.

From modern web graphics and raw camera assets to 4K video containers and PDFs — compress, convert, and optimize 30+ media formats locally without uploading a single byte.

Image Formats

11 Formats

Batch compress photos, vectors, and web graphics with visually lossless quality, alpha transparency support, and metadata stripping.

Supported Formats & Extensions
JPEG / JPG.jpg, .jpeg
PNG.png, .apng
WebP.webp
AVIF.avif
GIF.gif
TIFF.tiff, .tif
HEIC / HEIF.heic, .heif
SVG.svg
JPEG XL.jxl
BMP.bmp
ICO / ICNS.ico, .icns
Lossy & lossless modes
Full transparency support
EXIF / GPS metadata stripping

Video Containers & Codecs

12 Containers

Shrink 4K and 1080p footage directly on your local hardware with custom bitrate control, resolution downscaling, and fast-start web streaming.

Supported Formats & Extensions
MP4.mp4
QuickTime MOV.mov
WebM.webm
Matroska MKV.mkv
AVI.avi
M4V.m4v
WMV.wmv
MPEG / MPG.mpeg, .mpg
TS / MTS.ts, .mts
FLV.flv
3GP.3gp
DVD VOB.vob
H.264, H.265, VP9, AV1 & ProRes
Web faststart optimization
Target size presets (Discord & Email)

Document Formats

PDF Engine

Compress bulky PDF reports, scanned contracts, and presentations by optimizing internal stream structures without rasterizing text or degrading layout.

Supported Formats & Extensions
PDF Documents.pdf
Stream & object tree optimization
Keeps text crisp & selectable
No file upload limits

Audio Extraction & Sound Controls

5 Audio Options

Extract pristine audio tracks from your video library or remove unwanted audio streams entirely to save extra storage space.

Supported Formats & Extensions
MP3 Audio.mp3
AAC / M4A.m4a
WAV (Lossless).wav
Opus Audio.webm / .opus
Mute Video (Strip Audio)Any video container
Custom bitrates up to 320 kbps
1-click audio track removal
Lossless & high-efficiency codecs

All formats process 100% locally on your machine — zero network transmission, zero limits.

Available on macOS, Windows & Linux
Changelog

Actively maintained

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

All releases
NEW

v3.4.0 - macOS Installer & Stability Improvements

Today
v3.3.0

v3.3.0 - Refined macOS Setup & Folder Navigation

1 day ago
v3.2.2

v3.2.2 - Platform Sync & Update Delivery

2 days ago
v3.2.1

v3.2.1 - Ultra-Large File Compression & Memory Safety

3 days ago
v3.1.4

v3.1.4 - PDF Preview & Thumbnail Fixes

4 days ago
v3.1.3

v3.1.3 - Progress Bar Stability & Windows Previews

4 days ago
v3.1.2

v3.1.2 - Floating Dropzone, Visual Diff, Video Trimmer & PDF Support

4 days 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

3 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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