Smart Lossy & Lossless CompressionFine-tune JPEG and WEBP quality from 1–100%, or keep lossless PNG output — your choice, per batch.
Image Compressor — Free, Batch Compress, 100% Private
Compress JPG, PNG, WEBP, GIF and BMP images instantly — no signup, no upload, fully private. Reduce file size with an adjustable quality slider or a target size in KB, resize on the fly, compare before/after, and download every image at once as a ZIP.
✓ All Formats✓ 100% Free✓ No Upload✓ Batch Compress✓ Resize✓ ZIP Download✓ No Signup✓ Private
Drop Images Here to Compress
or click to browse, or paste from clipboard — JPG, PNG, WEBP, GIF, BMP · up to 30 MB each · batch upload supported
🔒 100% Private⚡ Instant📦 Batch & ZIP🎯 Target Size📥 Free
How to Compress an Image in 3 Steps
Upload Your Images
Drag & drop, click to browse, or paste from clipboard. Upload one image or hundreds at once.
Choose Your Settings
Pick a quality level or a target file size, optionally resize, and optionally convert format — then compress all at once.
Download Instantly
Download each image individually or grab every compressed image at once as a single ZIP file.
Free Image Compressor Features
Batch Compress Multiple ImagesUpload dozens of images at once and compress them all together with a single click.
Target File Size ModeEnter a size in KB and the tool automatically finds the best quality to hit it — no manual guessing.
Convert Between JPG, PNG & WEBPKeep the original format or convert every image to JPEG, PNG or WEBP on the fly.
Resize While CompressingScale images down by percentage or set a max width/height with aspect ratio locking.
Before/After Compare SliderDrag a split-view slider to visually compare the original and compressed image side by side.
Real-Time Savings StatsSee exactly how many KB or MB you saved, and what percentage smaller every file became.
Download All as ZIPGrab every compressed image in one click as a single ZIP file — built entirely in your browser.
Paste Images from ClipboardCopy a screenshot or image and paste it directly onto the page to add it instantly.
100% Private — No UploadImages never leave your device. All compression runs locally using the Canvas API.
Strips Hidden MetadataRe-encoding drops EXIF and other metadata automatically, reducing file size and protecting privacy.
Supports JPG, PNG, WEBP, GIF & BMPUpload almost any common raster image format — export as JPEG, PNG or WEBP.
Free Online Image Compressor — Reduce File Size Without Losing Quality
Utilsly's free image compressor shrinks JPG, PNG, WEBP, GIF and BMP images directly in your browser using the Canvas API. There's no upload, no signup and no limit on how many images you can compress — perfect for shrinking photos before emailing, uploading to a website, or sharing online.
How Our Image Compressor Works
Each image is decoded and redrawn onto an in-memory canvas at your chosen size, then re-encoded with adjustable JPEG or WEBP quality, or losslessly as PNG. Nothing is ever sent to a server — the entire process runs locally on your device, which also means it works offline once the page has loaded.
How to Get the Smallest File Size Without Losing Quality
For most photos, a quality setting of 70–85% with JPEG or WEBP output gives a great balance between file size and visual quality. If you need a precise file size — for a form upload limit or email attachment cap — use Target Size mode and enter the maximum KB allowed. Resizing large photos down to the dimensions you actually need also reduces file size dramatically.
Supported Formats — Input and Output
Input: JPG, PNG, WEBP, GIF and BMP. Output: JPEG, PNG or WEBP — or keep the original format. WEBP typically produces the smallest files for the same visual quality, while JPEG offers the broadest compatibility and PNG preserves transparency and stays fully lossless.
Common Use Cases for Image Compression
- Website Performance — Smaller images mean faster page loads and better Core Web Vitals scores.
- Email Attachments — Fit photos under email provider size limits without manual editing.
- Form & Upload Limits — Use Target Size mode to hit an exact KB cap required by a form.
- Social Media & Messaging — Reduce file size before sharing on apps with upload limits.
- Storage Savings — Shrink large photo libraries to free up cloud storage and device space.
- Bulk Processing — Compress an entire folder's worth of images at once and download as a ZIP.
Privacy — Your Images Never Leave Your Device
All compression happens entirely in your browser. Images are never uploaded to any external server, and metadata such as EXIF location data is automatically stripped during re-encoding — no account, no tracking, no data retention of any kind.