Kraken.io vs pngcrush
Kraken.io
kraken.iopngcrush
pmt.sourceforge.ioSide by side
| Figure | Kraken.io | pngcrush |
|---|---|---|
| Price from | $4.17/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Plans published | 12 | 1 |
| Spec score · Image Compression Software | 9.4 (#1) | 8.3 (#24) |
| API access | Yes | No |
| Batch processing | Yes | Yes |
| Compression modes | The product provides lossy, lossless and expert optimization modes. | lossless |
| Free plan | Yes | Yes |
| Metadata controls | Yes | Yes |
| Image resizing | Yes | No |
| Supported formats | The service supports JPG, PNG, WebP, animated WebP, GIF, animated GIF, SVG, AVIF, HEIC and PDF. | PNG |
Plans
Kraken.io
- FreeFree
- Micro$50 a year
- Basic$90 a year
- Advanced$190 a year
- Premium$390 a year
- Free AccountFree
- Micro$5 a month
- Basic$9 a month
- Advanced$19 a month
- Premium$39 a month
In their own words
Kraken.io
Kraken.io is an image optimization service with a browser tool and an API. In the browser, it can optimize, compress, resize, and convert images without code; it also accepts ZIP archives and returns a processed archive. Supported formats are JPG, PNG, WebP, GIF, SVG, AVIF, HEIC, and PDF. The service offers batch processing, metadata controls, and both listed compression modes, with a maximum upload size of 32. Each account starts with 100 MB of testing quota, and signup does not require a credit card. Monthly quota is measured by unprocessed source image data before overage charges. Plans include Free, Micro, Basic, Advanced, Premium, and Enterprise; the pricing note lists paid service from $5/mo. Customers can choose monthly or yearly billing and cancel, downgrade, or upgrade without a contract. Official plugins are available for WordPress and Magento.
pngcrush
pngcrush is a free command-line utility for losslessly optimizing PNG files. It tries compression levels and PNG filter methods to reduce the size of a file’s IDAT datastream, and supports batch processing. Its chunk controls can remove unwanted ancillary chunks or add gAMA, tRNS, iCCP, and textual chunks. The supported format is PNG; image resizing and API access are not provided. pngcrush runs from MSDOS, UNIX, or Linux command lines, and the maker links to precompiled Windows binaries for an MSDOS window. Source code is available from SourceForge and the pmt git repository, with libpng and zlib included in the distribution. The maker permits use, modification, and redistribution without a fee; the license is equivalent to, but not identical with, the libpng license. Build choices matter: the maker warns about overflow vulnerabilities when compiling with certain older unpatched libpng versions, and says a build statically linked with the supplied zlib is believed to avoid a particular double-free bug. The SourceForge files page lists pngcrush-1.8.11.tar.xz as the latest version. Free graphical applications that embed pngcrush are also noted by the maker.