Compress Images Online — Fast & Flexible
Compress images quickly with adjustable quality and target-size controls.
Popular ways to use this tool
Images are processed locally in your browser whenever possible. If local processing isn't supported or fails, we automatically complete the job on our servers — no action required. Compress JPEG, PNG, GIF, SVG, WebP, and AVIF inputs; download JPEG, PNG, WebP, or AVIF results individually or as a ZIP.
Why Use FastImageTools
Local-First Processing
Images are compressed in your browser by default using WebAssembly. Automatic server fallback if needed.
Fast Preview
Review compression quality before downloading. No signup or email is required for core workflows.
Free Core Features
Core compression workflows are available without watermarks; plan and processing limits still apply.
Smart Quality Control
Smart mode selects practical settings for file size and visual quality, and you can preview the result.
How to Compress Images
- 1
Upload JPEG, PNG, GIF, SVG, WebP, or AVIF Images
Drag and drop or browse for one image or a batch, then review the files before processing.
- 2
Choose a Compression Mode
Use Smart mode, set a total target size, or manually choose quality, dimensions, metadata handling, and output format.
- 3
Preview and Download Compressed Images
Preview the before-and-after comparison, then download files individually or as a ZIP archive.
Browser-Based vs Cloud Compression
FastImageTools (Local-First)
- Images stay on your device by default
- No upload wait for local jobs
- Local limits scale with browser and device resources
- Free core features with practical limits
- Automatic server fallback if needed
Cloud-Based Tools
- —Files uploaded to third-party servers
- —Speed limited by upload and download
- —Free tiers often limit file or batch size
- —Often requires paid plans for batch or large files
- —Requires a stable internet connection
Example Result
Original
2.4 MB
vacation-photo.jpg
Compressed
420 KB
Minimal visible difference
Supported Input and Output Formats
JPEG / JPG
Photos from cameras and phones. Lossy compression with adjustable quality.
PNG
Screenshots and graphics with transparency; PNG output uses lossless encoding.
WebP
Modern web format with efficient compression and transparency support.
AVIF
High-efficiency format for modern browsers and smaller web assets.
GIF
Accepted as input; animated GIFs may be rasterized during compression.
SVG
Vector input that may be rasterized when compressed or converted.
Frequently Asked Questions
Will compressing my images reduce their quality?+−
Is it safe to compress images here?+−
What is the maximum file size I can compress?+−
Can I compress multiple images at once?+−
What is the difference between lossy and lossless compression?+−
Which image format should I use for the web?+−
How is browser-based compression different from cloud tools?+−
Are my images uploaded to your servers?+−
Related Image Tools
Done compressing? These tools work great as a next step:
Resize Image
Change image dimensions for social media, email, or web.
Convert to WebP
Switch to the modern WebP format for smaller files.
Convert to AVIF
Use next-generation AVIF for maximum compression.
Optimize for Web
All-in-one optimization: compress, resize, and convert.
Image Difference Checker
Compare two images and highlight visual differences
Remove Background
AI-powered background removal for product photos.
Metadata Editor
View, edit, or strip EXIF and GPS data from images.