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Compress Image to 5KB, 10KB, 20KB… up to 2MB

Drag & Drop or
JPG PNG WEBP
What is Zero-Upload?

In Zero Upload Mode, your files are never uploaded to our servers. All compression happens locally on your device, and it even works offline—no internet connection is required. However, if your browser or device does not support Zero Upload Mode, or if you prefer faster performance, we recommend disabling this feature.

KB
Output:
Tip: Select WEBP to compress and convert to WEBP for even smaller files.

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Free Online Image Compressor & Resizer (JPG / PNG / WEBP)

Compress, crop, resize and convert with precision—fully in your browser. Zero‑Upload mode delivers 100% on‑device privacy and works offline after first load. Target exact file sizes (1KB → 2MB) without sacrificing visual quality.

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No Watermark Zero‑Upload Exact KB Target

Why Choose ImgSmaller?

We focus on practical control: crop before compress, rotate if needed, set an exact target size, switch formats (JPG ↔ WEBP ↔ original) and export immediately—all with Zero‑Upload 100% privacy and offline capability. No accounts, no noise—just results you can trust.

Multi‑Image Workflow

Upload several images, fine‑tune each, then download individually or as a ZIP.

Quality Preservation

Edge-aware processing and color fidelity reduce artifacts in gradients & text.

Flexible Conversion

Switch to WEBP for smaller output or keep original extension for compatibility.

Cropping + Rotation

Frame the subject precisely before compression—avoid wasting pixels.

Performance Focused

Fast initialization, minimal blocking scripts, smart lazy operations—offline after first load.

Private by Design

Zero‑Upload processing stays on‑device—nothing leaves your browser and it still works offline.

How It Works

  1. Upload or drag & drop one or multiple images (JPG / PNG / WEBP).
  2. Optional: crop & rotate for best framing.
  3. Set a target size (or enable Auto quality).
  4. Pick output format: JPG, WEBP or keep original.
  5. Enable Zero‑Upload for on‑device compression only (works offline).
  6. Compress & download single files or ZIP all.

Use Cases

  • Portfolio & resume submissions
  • E‑commerce product galleries
  • Blog feature & hero images
  • Social media thumbnails & banners
  • Client mockups & design previews
  • Email attachment size limits
  • Job portal strict KB requirements
  • App & dashboard UI assets

Data Privacy & Security

Your workflow, your control. In server mode, temporary uploads are automatically purged after a short retention window. Switch on Zero‑Upload mode and nothing is transmitted—processing stays entirely inside the browser sandbox and continues to function offline after initial load.

  • No account or tracking pixels required
  • HTTPS enforced end‑to‑end
  • Temporary storage auto‑deletion (server mode)
  • Local canvas processing in Zero‑Upload
  • Offline capable after first load
  • 100% on‑device privacy (Zero‑Upload)

Frequently Asked Questions

Which formats can I compress? ›
JPG, PNG and WEBP are fully supported for compression, cropping and resizing.
How small can I go? ›
You can target sizes as low as 1KB or choose any preset up to 2MB.
Will the quality drop? ›
Our adaptive tuning preserves clarity—edges, icons and gradients remain visually clean.
What is Zero‑Upload mode? ›
A privacy feature keeping all processing inside your browser—no file transfer occurs.
Can I process multiple images? ›
Yes, upload several, adjust individually, then zip download them all.
Is it really free? ›
Yes. No watermark, no forced signup, no paywall for core features.

Ready to Optimize Your Images?

Jump back to the uploader and start compressing—no signup, no waiting. Your pixels, perfectly optimized.

Get Started Now