Product Overview

Compression that runs on your machine — your files never leave it

SmartSlim Desktop is a cross-platform app powered by our proprietary Rust compression engine, with a modern React 19 + TypeScript + Tailwind CSS 4 interface. You get native-level compression speed in a lightweight package — a small installer and a low memory footprint.

Tech stack: Tauri 2.11 · Rust · React 19.1 · TypeScript 5.8 · Tailwind CSS 4.2
Platforms:Windows (x86_64) · macOS (Universal) · Linux (x86_64 / aarch64)

100% Local Privacy-First Batch Processing Drag & Drop Job History Resource Control 80 Formats

See It in Action

A clean, focused interface for batch compression — with results you can preview in real time

Core Features

Everything you need for everyday compression, in one app

80 formats: PDF, OFD, Word (doc/docx), Excel (xls/xlsx), PowerPoint (ppt/pptx), images (jpg/png/webp/gif, and more), video (mp4/mkv/mov, and more), audio (mp3/wav/opus, and more), 26 text types (Markdown/YAML/GeoJSON, and more), EPUB/EML, and industry & scientific data (DICOM/HDF5, and more) — 11 categories in total.
Batch processing: Drop in multiple files or entire folders. Jobs run sequentially to keep performance stable, even with large batches.
Job history: Every compression is logged with input/output paths, file sizes, compression ratio, and duration — easy to find and reuse.
Resource control: Dial CPU usage from 10% to 100% and cap memory as a percentage of system RAM, so compression never gets in the way of your other work.
Drag, drop, done: Drag files or folders straight into the window. SmartSlim detects the file type and queues it automatically.

Presets for Every Scenario

Three tuning dimensions to hit the right balance of quality and speed

4

Compression levels

low / medium / high / ultra

15

Scenario presets

web, email, archive, print, and more

5

Performance tiers

ultrafast / fast / balanced / quality / optimal

300

Possible combinations

4 × 15 × 5

Preset scenarios: archive storage, web publishing, email attachments, print-ready output, presentations, e-books, SEO optimization, accessibility, web streaming, social media, live streaming, editing proxies, video conferencing, mobile viewing, and proofing versions.

How levels work: Four compression levels (low / medium / high / ultra) let you trade file size against quality to match each use case.

Accounts & Plans

The free tier covers everyday use; subscriptions unlock the limits

Email Sign-In

Register and sign in with email and password, verified by a confirmation code.

Phone Sign-In

Register and sign in with a phone number and SMS verification code.

Single Sign-On

Sign in with WeChat, QQ, or your Apple ID.

Flexible Payments

Pay by card or through the App Store and Google Play. Monthly and annual plans available.

Plan Comparison

Free

$0

5 MB images / 10 MB documents

10 compressions per day

$9.90

Monthly

Files up to 1 GB

Unlimited usage

$98

Annual

Files up to 1 GB

Unlimited usage

Limits at a glance: the free tier compresses images up to 5 MB, other files up to 10 MB, and 10 files per day. Subscribers can process files up to 1 GB with no daily limit.

Two license types: Personal — a monthly or annual subscription for individuals, with email, phone, and SSO sign-in and online payment. Enterprise — volume licensing for organizations, activated with offline license keys and supporting centralized distribution and management, ideal for air-gapped environments. For enterprise licensing, contact our sales team.

Privacy & Performance

Local compression means your data never leaves your machine

Private by design: All compression happens locally. Files are never uploaded to any server, so there is nothing to leak. Only minimal authentication data is transmitted when you sign in or validate a subscription.
Lightweight and fast: A small installer and low memory footprint mean SmartSlim runs smoothly even on modest hardware.
Signed and verified: Multiple security mechanisms verify every caller before the compression engine runs, blocking unauthorized third-party access. See the security architecture.
Native Rust engine: The compression core is written in Rust and automatically picks the optimal strategy for each format. See the compression engine.

Platforms: Windows (x86_64), macOS (Universal: Intel + Apple Silicon), and Linux (x86_64 / aarch64). iOS and Android apps are coming soon.

Building with Our API?

Need compression inside your own app? Check out the full API documentation and SDK.

API Documentation Get the SDK

Get Started with SmartSlim Desktop

Download free — compression stays 100% local, so your files stay private.

Download Free Explore the SDK

SmartSlim Desktop