Free Online Image Tools
Resize images to exact KB, compress JPG / PNG / WEBP, convert formats and make passport photos — all free, all in your browser, with zero uploads.
Popular image tools
Used by thousands daily for forms, portals, email and websites.
Why FastResize?
Everything you need from an image tool — with none of the usual annoyances.
100% Free
No signup, no watermarks, no hidden limits. Use it as much as you want.
Private by Design
Images never leave your device. Processing happens 100% in your browser.
Instant Results
Fast canvas-based engine. Resize or compress in seconds, even on phones.
Works Everywhere
Any modern browser on desktop, tablet or mobile. Nothing to install.
How it works
Three steps, ten seconds, done.
Choose or drop your image
Any JPG, PNG or WEBP file. It is processed locally, never uploaded.
Pick your target
Set a KB size, pixels, percentage, quality or output format.
Download
Get your optimized image instantly. No signup, no watermark.
Which KB size do you need?
Match the file size to the task — most forms and portals print their limit right on the page.
| Target size | Best for | Tool |
|---|---|---|
| 20KB | Government forms, exam applications | Resize to 20KB |
| 50KB | ID photos, email attachments | Compress to 50KB |
| 100KB | Websites, resumes, upload portals | Compress to 100KB |
| 200KB | Clear email & document images | Compress to 200KB |
| 1MB | High-quality blog & portfolio photos | Compress to 1MB |
Frequently Asked Questions
Are these image tools really free?
Yes. Every tool on FastResize is free forever — no signup, no watermarks, no daily limits. Just upload, process and download.
Do you upload my images to a server?
No. All processing happens 100% in your browser using the HTML5 canvas API. Your images never leave your device.
Do I need to create an account?
No account, no email, no login. Open a tool and use it immediately.
How do I resize an image to exactly 20KB?
Open the resize to 20KB tool, upload your photo, and the tool automatically adjusts quality and dimensions until the file is 20KB or smaller. Then click Download.
What image formats are supported?
JPG, PNG, WEBP and AVIF for input and output, plus GIF, HEIC (convert to JPG first) and PDF (for the PDF tools). Output formats depend on the tool.
Is it safe to use on a public computer?
Yes. Because nothing is uploaded or stored, there is no trace of your images left behind after you close the tab.