Image compression
OpusImg vs TinyPNG
TinyPNG is the best-known image compressor on the web and it is genuinely good at the thing it does. The difference that matters is not compression quality; it is that TinyPNG uploads your files and OpusImg does not.
Claims about TinyPNG on this page were checked against their own live pages on . Pricing and limits change — verify anything you are about to act on.
Side by side
| OpusImg | TinyPNG | |
|---|---|---|
| Where files are processed | In your browser. Compression never uploads. | On their servers. Files are retained for up to 48 hours, then deleted. |
| Free tier limit | Unlimited. There is no per-file or per-month cap on local compression. | 20 compressions, 5 MB per image, 3 format conversions. |
| Paid plans | Free forever for the local tools. Pro $9/month unlocks the AI tools and the API beta. | Web Pro $3.25/month billed annually (unlimited compressions, 75 MB per image). Web Ultra $12.42/month billed annually (150 MB per image, unlimited conversions, folder upload). |
| Sign-up required | No account for any local tool. | Account required, including for the free tier. |
| Watermark | None. | None. |
| Batch | Yes, locally. The browser processes the set on your machine. | Yes, up to the plan's limit. Folder upload on Web Ultra. |
| API | Included with Pro, Business in beta: 1,000 operations/month, 20 MB maximum. | Yes. 500 compressions/month free, then $0.009 each to 10,000/month and $0.002 beyond. |
| Formats | JPEG, PNG, WebP, AVIF, with HEIC input. | JPEG, PNG, WebP, AVIF, JPEG XL and animated PNG. HEIC input converts to JPG. |
Where TinyPNG is better
- Their compression algorithm is excellent and very well tuned. On PNG in particular, TinyPNG's colour quantization is stronger than a generic encoder, and for flat illustration it will often beat a straightforward re-encode.
- The API is mature, cheap at volume, and has a WordPress plugin and a CDN behind it. If you want image optimisation to happen automatically on a WordPress site, that is a solved problem there and is not something OpusImg offers.
- Web Ultra's folder upload and 150 MB per-image ceiling handle inputs that a browser tab realistically cannot. A 150 MB TIFF is not a job for client-side WebAssembly.
- They support JPEG XL and animated PNG, which OpusImg does not. JPEG XL in particular is a genuinely better codec than anything in our set for high-quality photographic work, and if your delivery path can use it that is a real reason to go there.
Where OpusImg is better
- Nothing is uploaded. For client work under NDA, internal screenshots, or anything you would rather not hand to a third party, that is a different guarantee from a retention policy — and you can verify it yourself in the Network tab in about twenty seconds.
- No account, no monthly cap, and no per-file size limit beyond what your own machine can hold.
- Compression, conversion, resizing, cropping, redaction and OCR are the same tool set rather than separate products, so a multi-step job does not mean multiple uploads.
The real difference is architectural, not qualitative
Both products produce good compressed images. Benchmarking them against each other on a handful of photographs mostly measures which encoder settings each chose, and the answer moves image by image.
What does not move is where the work happens. TinyPNG receives your file, processes it on their infrastructure, serves you a result, and deletes both copies within 48 hours. That is a normal, competently run cloud architecture, and their retention policy is clearly stated. OpusImg's compressor is WebAssembly running in your browser: the file is decoded in a worker on your machine and written back to a file you save, and there is no request carrying the image data because there is nowhere for it to go.
For a holiday photograph, this distinction is academic. For a screenshot containing customer names, a document under a professional obligation, or a photograph whose EXIF still carries your home coordinates, it is the whole decision.
Where the free tiers actually bite
TinyPNG's free tier is 20 compressions with a 5 MB per-image ceiling. That is generous for occasional use and restrictive the moment you have a folder. The 5 MB limit in particular catches modern phone photographs, which routinely exceed it.
OpusImg has no equivalent limit because there is no per-file cost to us — the compute is yours. That is not generosity, it is a different cost structure, and it is worth understanding the trade: our ceiling is your device's memory, and a very large TIFF will fail in a browser tab where it would succeed on a server.
If you are choosing an API
Tinify's API is the stronger product today. It is older, its pricing scales further, and it is documented against years of production use. Our API is in beta with a 1,000-operation monthly allowance included with Pro, and it is aimed at people already paying for the AI tools rather than at high-volume optimisation.
If your requirement is "compress a million images a month automatically", their pay-per-compression pricing is the honest recommendation.
Which to use
Use TinyPNG when
You want automated WordPress or CDN optimisation, you need JPEG XL or animated PNG, your files are larger than a browser tab can hold, or you are optimising at a volume where per-compression API pricing is the point.
Use OpusImg when
The files should not leave your machine, you want no account and no monthly cap, or compression is one step in a job that also involves resizing, converting, redacting or reading text.
What we checked
Read on 7 September 2026. TinyPNG is a product of its respective owners and is not affiliated with OpusImg.
Try it here
Terms used on this page: Lossy compression, Lossless compression, WebP, Quantization.
See every comparison, or the OpusImg pricing these numbers come from.