php convert png to jpg
Use PHP to convert PNG to JPG with compression?
I have a bunch of high quality PNG files. I want to use PHP to convert them to JPG because of it’s smaller file sizes while maintaining quality. I want to display the JPG files on the web.
Does PHP have functions/libraries to do this? Is the quality/compression any good?
8 Answers 8
Do this to convert safely a PNG to JPG with the transparency in white.
Be careful of what you want to convert. JPG doesn’t support alpha-transparency while PNG does. You will lose that information.
To convert, you may use the following function:
This function uses the imagecreatefrompng() and the imagejpeg() functions from the GD library.
This is a small example that will convert ‘image.png’ to ‘image.jpg’ at 70% image quality:
This is a very good thumbnail script =) Here’s an example:
You might want to look into Image Magick, usually considered the de facto standard library for image processing. Does require an extra php module to be installed though, not sure if any/which are available in a default installation.
PHP has some image processing functions along with the imagecreatefrompng and imagejpeg function. The first will create an internal representation of a PNG image file while the second is used to save that representation as JPEG image file.
See this list of php image libraries. Basically it’s GD or Imagemagick.
I know it’s not an exact answer to the OP, but as answers have already be given.
I would also say GD might not get you the best quality/size ratio ; but not sure about that (if you do a comparison between GD and other solutions, I am very interested by the results 😉 )
Another approach, not using PHP, would be to use Image Magick via the command line (and not as a PHP extension like other people suggested)
As a sidenote : if you are doing this directly on your production server, you could put some sleep time between bunches of conversions, to let it cool down a bit sometimes ^^
I’ve use the shell script + convert / mogrify a few times (having them run for something like 10 hours one time), and they do the job really well 🙂
How can I convert all images to jpg?
Is possible convert all images (png, gif etc) to jpg with 100% quality? If yes, how? I would like allow to upload png and gif, but this script should convert this files to jpg. Is possible this with PHP?
6 Answers 6
Davide Berra’s answer is great, so I improved the file type detection a little, using exif_imagetype() instead of relying on the file extension:
You must have php_exif extension enabled to use this.
A small code to convert image.png to image.jpg at desired image quality:
a small fix to davide’s answer, the correct function for converting from BMP is «imagecreatefromwbmp» instead of imagecreatefrombmp (missing «w») also you should consider that png may be transparent, here is a way to fill it with white BG (jpeg can’t apply alpha data).
Not the answer you’re looking for? Browse other questions tagged php image-processing or ask your own question.
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Image Convert to JPG, PNG & GIF using PHP
In this post I help you to convert any uploaded image to JPG, PNG and GIF.
Create a file image_converter.php.
In this code you see using convert_image() has three mandatory parameters like as:
$convert_type => accepts string either png,jpg or gif.
$target_dir => it is the source as well as the target directory
$image_name => give the actual image name such as image1.jpg.
$image_quality => can be adjusted, if you don’t want 100% quality.
Next, create index.php to Upload the image.
Then, create convert.php to convert the image. And make a folder in your directory name as uploads. Because when the image is uploaded or convert, the image will save on this folder.
And, create a download.php to downloads the converted image forcefully.
Then, Run the index.php and see the view.
After Upload the image.
After converted the image.
Then, you can download or convert another image.
Php convert png to jpg
Convert JPEG & PNG to WebP with PHP
This library enables you to do webp conversion with PHP. It supports an abundance of methods for converting and automatically selects the most capable of these that is available on the system.
The library can convert using the following methods:
In addition to converting, the library also has a method for serving converted images, and we have instructions here on how to set up a solution for automatically serving webp images to browsers that supports webp.
News: 2.6.0 has just been released
Require the library with Composer, like this:
Here is a minimal example of converting using the WebPConvert::convert method:
The WebPConvert::convert method comes with a bunch of options. The following introduction is a must-read: docs/v2.0/converting/introduction-for-converting.md.
If you are migrating from 1.3.9, read this
Serving converted images
The WebPConvert::serveConverted method tries to serve a converted image. If there already is an image at the destination, it will take that, unless the original is newer or smaller. If the method cannot serve a converted image, it will serve original image, a 404, or whatever the ‘fail’ option is set to. It also adds X-WebP-Convert-Log headers, which provides insight into what happened.
Example (version 2.0):
The old introduction (for 1.3.9) is available here: docs/v1.3/serving/convert-and-serve.md
The library can be used to create a WebP On Demand solution, which automatically serves WebP images instead of jpeg/pngs for browsers that supports WebP. To set this up, follow what’s described in this tutorial (not updated for 2.0 yet).
Projects using WebP Convert
CMS plugins using WebP Convert
This library is used as the engine to provide webp conversions to a handful of platforms. Hopefully this list will be growing over time. Currently there are plugins / extensions / modules / whatever the term is for the following CMS’es (ordered by market share):
Other projects using WebP Convert
webp-convert-cloud-service A cloud service based on WebPConvert
webp-convert-concat The webp-convert library and its dependents as a single PHP file (or two)
Supporting WebP Convert
Bread on the table don’t come for free, even though this library does, and always will. I enjoy developing this, and supporting you guys, but I kind of need the bread too. Please make it possible for me to have both:
Persons who contributed with coffee within the last 30 days:
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Convert jpeg/png to webp with PHP (if at all possible)
A Simple Guide to PHP Convert PNG, JPG, GIF to WebP for Beginners – PHP Tutorial
WebP image is one of best image format used on sites, it is smaller than other image formats, such as jpg and png. In this tutorial, we will introduce how to convert png, jpg to webp image, you can change your website images to webp by our this tutorial.
To convert other format images to webp, we shoud use php imagewebp() function:
This function can save or ouput a webp image from other types of images.
Here we give a function to convert png to webp.
How does this function work?
Firstly, we get the format of source image by pathinfo().
Create an image by image type
Convert png, jpg to webp image
Then if you have converted webp image successfully, you can delete source image or not.
Moreover, if you plan to show webp image to browser using php, you can read this tutorial.
5 thoughts on “ A Simple Guide to PHP Convert PNG, JPG, GIF to WebP for Beginners – PHP Tutorial ”
Great tutorial. Thankyou
Hi, and if I dont want to save the file, just show?
use header(«Content-Type: image/webp»); or read tutorial Show WebP Image with PHP
not working. i tried using convertImageToWebP(‘pizza-hut.gif’, ‘om.webp’, 80); but its not working.
I have tested convertImageToWebp() with a gif image, it works. What are warnings or errors your php script output?