zopfli
Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression. (by google)
jpeg2png
silky smooth JPEG decoding (by victorvde)
| zopfli | jpeg2png | |
|---|---|---|
| 9 | 2 | |
| 3,382 | 469 | |
| 0.5% | - | |
| 2.6 | 10.0 | |
| about 1 month ago | over 3 years ago | |
| C++ | C | |
| Apache License 2.0 | GNU General Public License v3.0 only |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
zopfli
Posts with mentions or reviews of zopfli.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-05-02.
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How I use Devbox in my Elm projects
This project uses HTMLMinifier, optipng, and zopfli to create a custom production Elm build pipeline. You can see how I make use of these tools in this build script. Here are the results in case you're interested. I used the same ideas from this project to build and deploy dwayne/elm-conduit, which you can learn more about in my article Yet Another Tour of an Open-Source Elm SPA.
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PSA: Use ZopfliPNG to compress your PNG assets
I'm making a 2D game with lots of PNG assets. I recently found that ZopfliPNG regularly reduces the sizes of my assets by ~3x compared to Asesprite's output. I've tried a few other PNG compression tools, but ZopfliPNG consistently outperforms the others.
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Google Chrome Is Already Preparing To Deprecate JPEG-XL (~3x smaller than JPEG, HDR, lossless, alpha, progressive, recompression, animations)
I mean something better than Google's best engineers trying to optimize LZ77's compression as much as humanly possible, while remaining compatible with the DEFLATE/zlib bitstream.
- Improving App Performance
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Losslessly Optimising Images
zopflipng typically beats pngcrus and optipng (on Linux at least) but by default it drops auxillary PNG chunks [0] which can result in browsers (and other applications) using a different color space, causing the resulting images to look more washed out than the original. To prevent this you need to explicitly pass --keepchunks=cHRM,gAMA,pHYs,iCCP,sRGB,oFFs,sTER to zopflipng.
Unfortunately it (and most other tools) don't have APNG support, keeping only the first frame.
[0] https://github.com/google/zopfli/issues/113
- Good, but slow, deflate or zlib compression library
- What am I doing wrong? ffv1 vs "h264 -crf 0"
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webP animated
I tried going with a lot of different compression algorithms, in the end a lot of iterations of Zopfli delivers the best result. With that, I got the image down to 591 kB.
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KB Club: With links to HN, Reddit, Lobsters threads for each website
I tried zopflipng [1] with the very expensive option suggested from the usage and got 2,493 bytes (original 2,740 bytes, nowhere practical as it took 3 minutes) so you don't have to sacrifice the palette, though I'm not sure if 16 or even 4 color palette will significantly alter the visual.
[1] https://github.com/google/zopfli
jpeg2png
Posts with mentions or reviews of jpeg2png.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-10-31.
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Google Chrome Is Already Preparing To Deprecate JPEG-XL (~3x smaller than JPEG, HDR, lossless, alpha, progressive, recompression, animations)
That's not necessarily the case with the jpeg2png decoder, but it's been a while since I used it, and I'm not able to test right now. The PNG files will be smaller than with the usual JPEG decoding process, at least.
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Losslessly Optimising Images
This tool optimises blocky JPEGs for a better viewing pleasure: https://github.com/victorvde/jpeg2png
> jpeg2png finds the smoothest possible picture that encodes to the given JPEG file.
What are some alternatives?
When comparing zopfli and jpeg2png you can also consider the following projects:
oxipng - Multithreaded PNG optimizer written in Rust
ImageOptim-CLI - Make optimisation of images part of your automated build process
guetzli - Perceptual JPEG encoder
shrivel - Command line wrapper utility to shrink a path of images for web based on external tools.
libavif - libavif - Library for encoding and decoding .avif files
PNG-spec - Maintenance of the PNG specification
optipng-bin - optipng bin-wrapper that makes it seamlessly available as a local dependency
Zpng - Better lossless compression than PNG with a simpler algorithm