Convert Image Format Online Free — JPG, PNG, WebP, AVIF & More
Convert between image formats online for free. JPG to PNG, PNG to WebP, HEIC to JPG, and 20+ format combinations. Private, instant, guest access on supported tools only; AI uses signed-in credits.
Access and pricing
Supported tools include 5 free on-device uses per day, shared across eligible tools. On compatible devices, guest access needs no sign-in. Signed-in users also get 5 daily eligible on-device uses. AI and cloud processing use credits separately.
New accounts can claim 20 welcome credits once. Eligible offers in MiOffice can earn up to 80 reward credits; offer conditions apply.
Starter costs $6.99/month and includes 250 credits at each paid renewal plus unlimited eligible local processing. Unused credits roll over. The $2.99 Day Pass covers 24 hours of eligible local processing; AI and cloud credits are separate.
Compare tools using a representative file and inspect the export. Check supported formats, device compatibility, processing location and the displayed cost before starting. This article is published by MiOffice; consider its recommendations with that affiliation in mind.
Access and pricing updated October 30, 2026. This editorial update does not indicate a new test run.
Why Convert Image Formats?
Different platforms, applications, and use cases require specific image formats. Your iPhone saves HEIC, websites want WebP, and your printer needs TIFF. Instead of installing desktop software, convert instantly in your browser.
Compatibility
Some apps only accept specific formats. Government forms want JPG, design software needs PNG, and web developers prefer WebP.
File Size
WebP is 25-35% smaller than JPG. Converting large PNGs to JPG can save 80%+ file size with barely visible quality loss.
Transparency
Need transparency? Convert to PNG or WebP. Removing transparency? Convert to JPG for much smaller files.
Modern Formats
HEIC from iPhones and AVIF from modern browsers need conversion to universal formats like JPG for sharing.
How to Convert Image Format Online
- 1
Open the Image Converter
Go to our free image converter. Works on desktop, tablet, and mobile.
- 2
Upload Your Images
Drag and drop one or more images. Supports JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, TIFF, and more.
- 3
Select Output Format & Download
Choose your target format from the dropdown, adjust quality if needed, and download your converted images.
Image Format Comparison
| Format | Best For | Transparency | File Size |
|---|---|---|---|
| JPG | Photos, email | No | Small |
| PNG | Graphics, logos | Yes | Large |
| WebP | Websites | Yes | Smallest |
| AVIF | Next-gen web | Yes | Smallest |
| HEIC | iPhone photos | No | Small |
| GIF | Animations | Yes (1-bit) | Medium |
| SVG | Icons, logos | Yes | Tiny |
MiOffice vs Other Image Converters
| Feature | MiOffice | CloudConvert | Convertio |
|---|---|---|---|
| Privacy | runs in your browser | Server upload | Server upload |
| Signup | Not required | For API | Required |
| Daily Limit | 5 shared daily eligible on-device uses | 25/day free | 10/day free |
| Speed | Instant (local) | Depends on server | Queue delays |
local-first conversion. Unlike CloudConvert, Convertio, and Zamzar, MiOffice never uploads your images to any server. Conversion happens entirely in your browser. Your files stay on your device — always.
Convert Your File Now
MiOffice AI is an AI-powered digital workspace studio. Create, edit, convert, compress, collaborate, and share — video, audio, images, documents, scanning, notes, screen sharing, and file transfer. the full MiOffice catalog, all in one place.
Frequently Asked Questions
What image formats are supported?
Will converting formats reduce quality?
Can I convert multiple images at once?
Do my images get uploaded to a server?
Which format should I choose?
Jay Padimala
CEO & Founder
Jay Padimala is CEO and Founder of MiOffice, a product of JSVV SOLS LLC.
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