The Best TinyPNG Alternatives in 2026: Free Image Compressors Tested

TinyPNG has been the go-to image compression tool for years, and for good reason: it works. But after hitting its 5 MB file limit for the third time in a week, I started looking for alternatives. What I found is that the competition has caught up - and in some cases, surpassed it.

Here is what I learned after testing every serious TinyPNG alternative I could find.

What TinyPNG Actually Does (and Where It Falls Short)

TinyPNG uses lossy compression for PNG and JPEG files by reducing the number of colors in an image. The result is smaller files with minimal visible quality loss. It is fast, free up to 20 images per session, and the API is used by millions of developers.

The friction points:

• 5 MB file limit on the free web tool
• Your images are uploaded to TinyPNG's servers - a concern for confidential or client work
• No local batch processing on the free tier
• Limited format support - no WebP or AVIF output without the paid API
• No visual comparison to verify quality before downloading

If any of those matter to your workflow, you need an alternative.

What to Look for in a TinyPNG Alternative

Before diving into the tools, here is the checklist I used:

• Compression quality - does it actually reduce file size without destroying the image?
• Privacy - are files uploaded to a server, or processed locally?
• Format support - can it handle PNG, JPEG, WebP, AVIF?
• Batch processing - can you compress multiple images at once?
• File size limit - is there a cap?
• Price - is the core functionality free?

The Best TinyPNG Alternatives

1. Small.im - Best for Bulk Compression Without Uploads

Small.im processes images entirely in your browser using WebAssembly. Nothing leaves your device. You can drop in 50 images at once and compress them all in under a minute - free, with no file size cap imposed by server constraints.

What it does well:

• 100% local processing - images never leave your machine
• True batch compression (not just 20 files at a time)
• Supports PNG, JPEG, WebP, and AVIF
• Visual before/after slider for quality verification
• Free with no account required

Where it differs from TinyPNG:

• Runs on your hardware, so very large files (100+ MB) compress at the speed of your CPU/GPU, not a throttled server
• No artificial file size limit

Best for: Designers and developers who need to compress large batches, work with confidential images, or want to avoid uploading files to third-party servers.

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2. Squoosh - Best for Fine-Grained Control

Google's Squoosh is an open-source, browser-based image compressor that runs entirely in your browser. It supports an impressive list of formats including AVIF, WebP, MozJPEG, OxiPNG, and more.

Pros:

• Local processing - zero uploads
• Real-time side-by-side quality preview
• Deep control over compression settings (quality sliders, effort levels)
• Free and open source

Cons:

• One image at a time - no batch processing
• The interface can be overwhelming for casual users
• Slower on older devices due to WebAssembly encoding

Best for: Developers and power users who want granular control over a single image's compression settings.

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3. ImageOptim - Best Mac Desktop App

ImageOptim is a free Mac desktop application that runs multiple lossless and lossy compression algorithms (Zopfli, PNGOUT, Gifsicle, MozJPEG) and picks the smallest result. You drag files onto the window and it compresses them in place.

Pros:

• Combines multiple compression engines automatically
• Drag-and-drop batch processing
• Strips unnecessary metadata (EXIF, color profiles)
• All local - no network access required

Cons:

• Mac-only
• No format conversion (PNG stays PNG, JPEG stays JPEG)
• No WebP or AVIF output

Best for: Mac users who want a set-it-and-forget-it desktop tool for lossless optimization.

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4. Compressor.io - Closest TinyPNG Alternative Online

Compressor.io is the most direct like-for-like replacement for TinyPNG. You upload an image, it compresses it, you download the result. It supports JPEG, PNG, GIF, SVG, and WebP.

Pros:

• Simple interface - drop, compress, download
• Good compression ratios, especially for JPEG
• Supports SVG (which TinyPNG does not)
• 10 MB file limit (double TinyPNG's free limit)

Cons:

• Images are uploaded to their servers
• One image at a time on the free plan
• No batch processing without a paid plan

Best for: Anyone who wants a simple TinyPNG-style online tool with a slightly higher file size limit.

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5. ShortPixel - Best JPEG Compression

ShortPixel is primarily a WordPress plugin but also has a solid online compressor. In my tests, it consistently delivered smaller JPEG files than TinyPNG - one 2.1 MB JPEG came out at 1.13 MB vs. TinyPNG's 1.7 MB.

Pros:

• Best-in-class JPEG compression (lossy, glossy, and lossless modes)
• WebP and AVIF output
• 10 MB file limit
• Strong WordPress integration for automated optimization

Cons:

• Images are uploaded to ShortPixel's servers
• Free plan limited to 100 images/month
• Slower processing than browser-based tools

Best for: WordPress site owners and anyone whose main bottleneck is JPEG file size.

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6. Kraken.io - Best for Developers via API

Kraken.io is aimed at developers who need to automate image optimization at scale. The API is well-documented, fast, and reliable. It handles JPEG, PNG, GIF, and SVG.

Pros:

• Robust REST API
• Good documentation and client libraries
• Lossless and lossy modes
• S3 and Azure Blob Storage integration

Cons:

• Not designed for casual one-off compression
• Paid plans only (with a free tier limited to 100 MB total)
• Images uploaded to servers

Best for: Developer teams building automated image processing pipelines.

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7. Optimizilla - Simplest Free Option

Optimizilla is no-frills: drop images, adjust quality sliders per image, download. It handles JPEG and PNG, processes up to 20 files at once, and requires no account.

Pros:

• Per-image quality control with preview
• Free, no account needed
• Batch processing (up to 20 at once)

Cons:

• Images uploaded to their servers
• JPEG and PNG only - no WebP or AVIF
• 8 MB file limit

Best for: Casual users who want TinyPNG-level simplicity with per-image quality control.

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Comparison Table

Tool	Local Processing	Batch	Max File Size	WebP/AVIF Output	Free
TinyPNG	No	20 at once	5 MB	No	Yes
Small.im	Yes	Unlimited	No limit	Yes	Yes
Squoosh	Yes	No (1 at a time)	No limit	Yes	Yes
ImageOptim	Yes	Yes	No limit	No	Yes
Compressor.io	No	No	10 MB	No	Yes
ShortPixel	No	Yes (paid)	10 MB	Yes	Limited
Kraken.io	No	Yes (API)	Varies	No	Limited
Optimizilla	No	20 at once	8 MB	No	Yes

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Which Should You Use?

If privacy matters (client work, confidential images, or just a general preference not to upload files to strangers' servers): Small.im or Squoosh. Both run entirely in your browser with zero uploads.

If you need bulk compression: Small.im handles unlimited files at once. Squoosh is one at a time.

If you need the absolute smallest JPEG: ShortPixel consistently wins on JPEG compression ratios, though you have to upload to their servers and the free plan is capped.

If you are on Mac and want a desktop tool: ImageOptim - drag, drop, done.

If you are a developer building a pipeline: Kraken.io has the most mature API. ShortPixel is a close second.

If you just want TinyPNG but with a bigger limit: Compressor.io gives you 10 MB instead of 5 MB and supports SVG.

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Bottom Line

TinyPNG is still a fine tool, but it is no longer the default choice it once was. The landscape has matured. If you are not doing anything sensitive, Compressor.io or Optimizilla cover the casual use case. If you compress images regularly, Small.im's local batch processing is a meaningful upgrade - no uploads, no limits, and a before/after comparison built in.

The right choice depends on your workflow, but you have real options now.

References

1. TinyPNG Developer API - TinyPNG (2024)
2. Squoosh - GoogleChromeLabs (2024)
3. ImageOptim - ImageOptim (2024)
4. Web Almanac: Page Weight Chapter - HTTP Archive (2024)