Best Free Tools for Converting Images Between Formats

Why image format conversion still matters

Even in 2026, image format compatibility remains a daily friction point. You have a PNG screenshot that needs to be a JPG for email. A client sends a BMP that your web project cannot use. A batch of photos needs to be WebP to cut page load times in half. The need to convert between image formats is not going away.

The good news: free image converter tools have gotten dramatically better. Most now handle the major formats, and some run entirely in your browser without uploading a single file to a server.

What we tested

We evaluated six free image converter tools across four criteria:

• Format support -- how many input and output formats are available
• Speed -- how fast conversion happens for a typical 5MB image
• Privacy -- whether files are uploaded to a server or processed locally
• Ease of use -- sign-up requirements, watermarks, and UI quality

1. InfinyHub Image Converter

InfinyHub takes a different approach from most converters. Instead of uploading your files to a cloud server, it processes everything directly in your browser. That means your images never leave your device -- a meaningful privacy advantage for sensitive documents, client work, or personal photos.

Format support covers all the essentials: PNG, JPG, WebP, AVIF, GIF, BMP, and TIFF. The interface is clean, the conversion is fast, and there is no sign-up, no watermark, and no file size limit that we could find.

Pros

• 100% browser-based -- no file upload
• No sign-up required
• Supports all major formats including AVIF
• Free with no watermarks
• Batch conversion supported

Cons

• Does not support niche formats like RAW or PSD
• Newer tool with smaller user base

2. Convertio

Convertio is one of the most established cloud-based image converters. It supports over 100 formats, including RAW camera files, and integrates with Google Drive and Dropbox for direct cloud-to-cloud conversion.

The free tier limits you to 100MB per file and 10 conversions per day. For occasional use, that is usually enough. The interface is polished and the conversion quality is consistently good.

Pros

• Over 100 supported formats
• Cloud storage integration
• Built-in batch conversion
• Browser extension available

Cons

• Free tier: 100MB limit, 10 conversions/day
• Files are uploaded to their servers
• Requires sign-up for full features

3. CloudConvert

CloudConvert is another mature player with strong format support and a reputation for quality. It handles image, video, audio, document, and archive conversions -- making it a versatile tool beyond just images.

The free tier gives you 25 conversions per day with a 1GB file size limit, which is generous compared to most competitors. The API is also well-documented if you need programmatic access.

Pros

• 1GB free file size limit
• 25 free conversions per day
• Multi-format support (images, video, audio, documents)
• Good API for developers

Cons

• Files uploaded to cloud servers
• Requires account for API access
• Can be slow during peak hours

4. Zamzar

Zamzar has been around since 2006 and remains a reliable choice for straightforward format conversion. It supports over 1,200 file types across categories, though image-specific support is comparable to other tools.

The free tier limits you to 50MB per file and 2 conversions at a time. It is a solid choice if you just need a quick, no-fuss conversion and do not mind the upload.

Pros

• Long-standing reputation and reliability
• Very wide format support
• Simple, no-clutter interface

Cons

• 50MB free file size limit
• Only 2 simultaneous conversions on free tier
• No batch processing on free plan

5. FreeConvert

FreeConvert offers a generous free tier with a 1GB file limit and batch conversion support. It covers all the standard image formats and includes basic editing options like resizing and cropping during conversion.

The interface is straightforward, though it does show ads on the free tier. Overall, it is a solid pick for users who need to convert larger files without paying.

Pros

• 1GB file size limit on free tier
• Batch conversion available
• Basic editing tools built in
• Good format coverage

Cons

• Ad-supported free tier
• Files uploaded to servers
• Slower than browser-based alternatives

6. iLoveIMG

iLoveIMG is part of the iLove family of tools (iLovePDF, iLoveOffice, etc.). It focuses on image tasks: convert, compress, resize, crop, and rotate. The conversion feature supports the standard web formats (PNG, JPG, WebP, GIF).

It is best suited for users who need quick batch processing of multiple images. The free tier allows processing multiple files at once, though with some limits on total volume.

Pros

• Good batch processing capabilities
• Part of a larger ecosystem of tools
• Clean, modern interface
• Quick processing speed

Cons

• Limited to common web formats
• Files uploaded to servers
• Free tier has daily limits

Comparison table

When to use which tool

There is no single "best" tool for everyone. Here is a quick decision guide:

• Privacy is your top concern: Use InfinyHub. Your files never leave your browser.
• You need obscure formats (RAW, PSD, HEIC): Use Convertio or CloudConvert for the widest format coverage.
• You need to convert large files for free: CloudConvert or FreeConvert both offer 1GB limits on free tiers.
• You need a quick one-off conversion: Zamzar or InfinyHub -- both are fast and simple.
• You need to process many images at once: iLoveIMG or InfinyHub for batch support.

Why browser-based conversion is the future

The trend is clear: more processing is moving to the client. Modern browsers can handle image encoding and decoding natively using the Canvas API and WebAssembly. That means tools like InfinyHub can offer conversion quality equal to server-based tools, but without the privacy trade-off.

As browser capabilities continue to grow, expect the gap between "upload to a server" and "process locally" to close entirely. For most common image formats, it already has.

Try InfinyHub Image Converter free

Convert PNG, JPG, WebP, AVIF, GIF, BMP, and TIFF -- entirely in your browser. No file upload, no sign-up, no watermark. Try the best free image converter online.

Frequently asked questions