Compression Quality
TinyPNG uses a well-tuned lossy compression algorithm that has been refined over a decade. It is excellent for PNG files specifically — it converts 24-bit PNG to 8-bit indexed colour in ways that look nearly identical at normal screen sizes. For anything over 500px, the quality/size tradeoff is hard to beat.
Glopix.app's compressor uses a configurable quality slider and supports per-image settings. This gives you more control at the cost of more decisions. In blind tests on JPEG compression, both tools produce output within 2–5% of each other at equivalent visually-lossless settings. For PNG, TinyPNG has a slight edge in extreme compression. For JPEG and WebP, Glopix is comparable and often faster on large files because of client-side processing.
Format Support
This is the clearest differentiation. TinyPNG compresses JPEG, PNG, and WebP. Full stop. Glopix.app handles 15+ formats including AVIF, HEIC from iPhones, JPEG XL, PSD files from Photoshop, RAW files from DSLRs, DICOM medical images, and more. If your workflow goes beyond the basic three, TinyPNG will hit a wall.
Free Tier Reality
TinyPNG's web interface (not the API) allows 20 compressions per month on the free tier — this limit catches many users off guard. Once you hit 20, you need to pay. Glopix.app has no monthly cap on most individual tools via the web interface. The Batch Processor caps at 50 files per job on free, but you can run multiple jobs. For someone processing even 50–100 images a month, this difference is significant.
Privacy Considerations
TinyPNG uploads your files to their servers, processes them there, and returns results. They say files are deleted within 24 hours. Glopix.app processes most operations client-side using WebAssembly — your files never leave your browser for compression, conversion, and most editing tools. If you handle sensitive documents, product NDAs, or client materials, this distinction matters.
When to Use Each
- Use TinyPNG when: You exclusively need PNG compression and want the absolute best PNG minification algorithm. TinyPNG's PNGquant-style approach is outstanding for this specific use case.
- Use Glopix.app when: You need a full workflow tool — multiple formats, background removal, social media resizing, batch processing, WebP conversion, and privacy-first processing all in one place.
Bottom Line
TinyPNG is excellent at one thing. Glopix.app does that one thing at a comparable level, plus 40 more things, with no upload limits, broader format support, and client-side privacy. The main reason to still use TinyPNG is habit, existing workflows, or the specific edge case where PNG QUantization at maximum compression is your only use case.
Frequently Asked Questions
Is Glopix.app better than TinyPNG for free users?
Yes, for most use cases. Glopix.app has no file size limit, no account required, no monthly upload cap on individual tools, and supports 15+ formats vs TinyPNG's 3. TinyPNG caps free users at 20 uploads/month and 5 MB per file.
Does TinyPNG support WebP?
TinyPNG added WebP compression support. Glopix.app supports WebP, AVIF, HEIC, JPEG XL, PSD, RAW, DICOM, and 10+ additional formats.
Which compressor gives better file sizes?
Both tools produce similar output at equivalent quality settings — typically within 2–5% of each other. Glopix.app allows finer quality control via a slider, while TinyPNG uses a fixed algorithm optimised for PNG.
Does TinyPNG offer background removal?
No. Glopix.app includes an AI background remover, background replace tool, and 35+ additional image editing tools beyond compression.