Image Optimizer

Compress and optimize PNG, JPG, WebP, AVIF, HEIC images — reduce file size without losing quality

Free Image Optimizer — Compress PNG, JPG, WebP Online

ezyimg's Image Optimizer reduces image file sizes by up to 90% using quality compression and format conversion. Choose from one-click presets (Web, Social Media, Email, Lossless) or fine-tune format (WebP, JPEG, PNG), quality (20–100%), and optional resize. All processing runs locally in your browser — no uploads, no watermarks.

How to Use

  1. 1

    Upload an image

    Drop any PNG, JPG, WebP, AVIF, or HEIC file. The original file size and dimensions are shown immediately.

  2. 2

    Choose a preset or adjust manually

    Quick presets cover the most common use cases. For more control, pick format (WebP/JPEG/PNG), quality %, and optional max width.

  3. 3

    Optimize

    Click 'Optimize Image'. The result is generated instantly in your browser.

  4. 4

    Compare and download

    The Before/After comparison shows exactly how much was saved. Download the optimized file.

Tips & Best Practices

  • →WebP gives the best compression — 25–35% smaller than JPEG at the same visual quality. Use it for websites.
  • →For photos destined for Instagram or Twitter, use the Social Media preset (JPEG 85%, 1200px).
  • →For logos and graphics with transparency, use Lossless PNG — quality slider doesn't apply.
  • →Combining resize + quality reduction is the most effective way to shrink large photos.
  • →Quality 80–85% is the sweet spot for JPEG: barely distinguishable from the original but 60–70% smaller.

Frequently Asked Questions

How do I compress an image online for free?

Upload your image to ezyimg's Image Optimizer, choose a preset or set quality manually, then click Optimize. The compressed image downloads instantly with no watermark and no account needed.

What is the best image format for the web?

WebP is the best format for web use — it is 25–35% smaller than JPEG at the same quality and supports transparency like PNG. All modern browsers support WebP.

How do I reduce image file size without losing quality?

Use quality 80–90% for JPEG or WebP — the visual difference from 100% is imperceptible to most people but the file size drops by 50–70%. For completely lossless compression, use PNG.

What is the best quality setting for JPEG?

Quality 82–85% is the recommended range for JPEG. Below 75%, visible artifacts appear in photos. Above 90%, the file size increases significantly with minimal visual benefit.

Can I optimize HEIC images from iPhone?

Yes. Upload your HEIC photo directly — ezyimg converts it automatically using heic2any in your browser, then optimizes it to JPEG or WebP.