Compress images without uploading them: an alternative to TinyPNG and iLoveIMG
TinyPNG made image compression effortless: drop a PNG, get a lighter one. The catch is easy to miss: every image you drop is first uploaded to their servers. For screenshots with personal data, client work under NDA, or simply a slow connection, that upload is the part you may not want.
The image tools below run in your browser with the same class of modern codecs, MozJPEG, OxiPNG, WebP and AVIF. The same kind of result, with no upload and no plan-based caps.
Side-by-side comparison
| Feature | TinyPNG | iLoveIMG | Sunasty |
|---|---|---|---|
| Where your files are processed | On their servers: your file is uploaded | On their servers: your file is uploaded | In your browser: the file never leaves your device |
| Price | Free with limits, paid plans to lift them | Free with limits, paid plans to lift them | 100% free |
| Account | Required for some features | Required for some features | Never required |
| Works offline | No | No | Yes, once the page has loaded |
This comparison describes how each service is built (browser or server processing, free tier model). It deliberately avoids exact quotas and prices, which can change at any time. All product names belong to their respective owners.
Alternative to TinyPNG
TinyPNG, with its sibling TinyJPG, is the reference for quick lossy compression of PNG and JPEG, and now WebP and AVIF too. It is genuinely good at what it does; the free web tool has size and batch caps, and the paid tiers exist for volume, API access and integrations.
Our image compressor takes the same approach, perceptual lossy compression with modern codecs, directly in your browser: pick a quality or a target size in KB, process whole batches at once, and nothing is uploaded.
When TinyPNG is still the better choice
If you need compression inside an automated pipeline, an API, a CMS plugin or a build step, that is exactly what TinyPNG’s paid offering is for, and a browser tool is not a substitute. Squoosh, Google’s open source compressor, is another fine local option for single images.
Alternative to iLoveIMG
iLoveIMG is iLovePDF’s image sibling: resize, crop, compress, convert and watermark, all processed on their servers, with the same freemium model and an account for batches and some features.
Every operation in that everyday set has a local equivalent below: resizing, cropping, compressing, rotating, watermarking or converting images, free and without your pictures leaving the device.
When iLoveIMG is still the better choice
iLoveIMG’s AI upscaler and background removal run heavy models on GPU servers. Browser-side equivalents at comparable quality are not something we can offer honestly today, so for those two jobs their service is the better pick.
The image tools you get here
- Compress images Reduce image file size without uploading. Quality slider or target file size in KB. Batch supported.
- Resize images Resize and convert your images (JPEG, PNG, WebP) without uploading them.
- Crop image Crop your images with an interactive preview, drag and resize the crop area. No upload.
- Rotate & flip images Rotate images 90/180/270° or flip them horizontally and vertically, without uploading.
- Add watermark Overlay a text or image watermark on your photos. Opacity, position, tiling, all in the browser.
- Circle crop image Crop any image to a perfect circle with transparent corners. Download as PNG. No upload.
- Convert HEIC to JPG Convert iPhone HEIC/HEIF photos to JPG or PNG without uploading them.
- Redact image regions Blur or black-box sensitive areas of your images before sharing, no upload.
- Favicon generator Generate favicon PNGs at 16/32/48/180/192/512 px from any image. No upload.
- SVG optimizer Optimize and minify SVG files with SVGO directly in your browser. No upload.
Frequently asked questions
Is the compression as good as TinyPNG’s?
It uses the same family of techniques and codecs: MozJPEG for JPEG, OxiPNG for PNG, plus WebP and AVIF. On typical photos and screenshots the results are comparable. Since both are free for a single image, the honest answer is to run your own picture through both and compare.
Is there a file size or batch limit?
Only what your device’s memory can handle. There is no plan-based cap: the work happens on your machine, so we have no server bill to protect with quotas.
What about EXIF data and privacy?
Because the image never leaves your browser, there is nothing to intercept in transit and no copy on a server. Re-encoding also drops EXIF metadata from the output, and you can inspect or strip metadata explicitly with the EXIF tools.