100% On-Device · WASM Powered · Zero Uploads

Reduce the weight.
Keep the full value.

Turn multi-megabyte photos into lightweight, ultra-crisp files — directly inside your browser. Process hundreds of high-res photos & iPhone HEIC shots in bulk with absolute privacy and zero server uploads.

Open Image Optimizer Calculate Savings

100% Private

WASM Fast

HEIC Ready

Original 8.4 MB

Optimized 214 KB

97% Size Reduced

← Drag slider to compare →

Interactive Savings Estimator

Calculate Your Disk Space & Data Savings

Drag the slider to see how much device storage, mobile data expenditure, and cloud subscription costs CHIKARA saves you in bulk.

Number of Photos to Compress:

850 photos

50 photos 2,500 5,000 10,000 photos

Quick Presets:

Mobile Data Impact: Compressing files before sending via mobile networks saves significant bundle costs — especially critical for EcoCash, mobile money top-ups, and limited bandwidth connections.

Disk Space Saved

6.7 GB

From ~7.0 GB down to ~300 MB

Est. Mobile Bandwidth Saved

6,750 MB bandwidth saved

Save ~$15–$35 on cellular data packages

Cloud Tier Upgrade Saved

$36 / year

Avoid stepping up into paid iCloud / Google storage tiers

Simple Workflow

Three Steps. Effortless Results.

No steep learning curve. Drop your images and let the local WebAssembly engine do the work.

STEP 01

Drop Your Images

Drag & drop any batch — JPEG, PNG, WebP, AVIF, or raw iPhone HEIC photos. Entire folders supported smoothly.

STEP 02

Set Quality & Format

Choose balanced compression presets or specify exact target file sizes (e.g. keep under 200 KB).

STEP 03

Export & Download ZIP

Save optimized photos individually or download a consolidated ZIP archive with complete savings summary.

Built For Heavy Workloads

Engineered For Large Photo Collections

Not a toy web tool. A high-performance local application designed for hundreds of high-res photos.

HEIC & HEIF Native Decoding

Decode iPhone high-efficiency photos smoothly in browser memory without external plugins or cloud uploads.

WebP, AVIF & JPEG Export

Convert to modern next-gen image formats with exact quality controls, dimensions, and metadata retention.

Multi-Thread Batch & Instant ZIP

Process hundreds of photos simultaneously across multiple CPU cores and archive them in a single fast ZIP download.

Visual Difference Inspector

Inspect original vs compressed images side-by-side before exporting to guarantee zero perceptible visual degradation.

Target File Size Mode

Specify exact maximum file size thresholds for strict submission portals, email attachments, or web forms.

Installable Offline PWA

Install directly onto your desktop or mobile device. Works completely offline without needing an active internet connection.

Zero-Knowledge Guarantee

Your Images Never Leave Your Device

Everything executes locally inside your browser memory using WebAssembly. No account creation, no external server uploads, and no analytics tracking. Personal, medical, and proprietary photos remain 100% private.

0% Server Transit

Offline Capable Shell

Zero Telemetry

Transparent Support Model

Use It Free. Contribute If It Earned It.

CHIKARA has zero paywalls, forced subscriptions, or locked features. If it saved you valuable disk space, bandwidth, or cloud costs, consider supporting independent software development.

"If this just gave your phone a bit more breathing room, a coffee is a lovely reply."

Casual Batch

Ideal for quick phone album cleanup or occasional HEIC conversion tasks.

100% Unlocked Features
Local WASM Engine
Supports Future Updates

Contribute $9

Reduce the weight. Keep the full value.