3.0.3 • Public • Published

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TinyPNG API wrapper for compressing PNG & JPG images

An actively maintained & developed fork of gulp-tinypng-compress.

Main differences from gulp-tinypng-compress

  • Added new option (keepMetadata) to preserve metadata. Currently only copyright and creation date is supported.
  • Added new option (keepOriginal) to override the original image instead of creating a new compressed file in the output path.
  • Updated minimatch plugin to current version to avoid deprecated warnings.
  • Fixed Problem with Bad Gateway errors receiving from the api. On error the plugin tries on default 10 times a reattempt and simply skips the image if the server is still not reachable (Thanks to @kevinranks) compressing the next images.
  • On error the signature file is still being written for all successfully compressed files.
  • Added check for empty or broken images to be skipped and not send


Requires node 10.x.x or above

Install with npm - In your project folder, run:

npm install gulp-tinypng-extended

To run tests:

npm test


var gulp = require('gulp');
var plumber = require('gulp-plumber');
var tinypng = require('gulp-tinypng-extended');

gulp.task('tinypng', function () {
	return gulp.src('images/src/**/*.{png,jpg,jpeg}')
			key: 'API_KEY',
			sigFile: 'images/.tinypng-sigs',
			log: true



Returns Stream containing compressed images


Type: Object / String Default: false

Sets options described below from its properties. If type is not object, string presumed (the API key)


Type: String Default: ''

Your TinyPNG API key to use for requests


Type: String Default: ''

If set to a filename, it will compare existing source file md5 signatures against those found in the file's json data. When the signatures match, the file is skipped from being minified again, allowing you to better stay within your API request limits. When an image is minified, the md5 signature is determined from the unminified source image and written to the file at options.sigFile (a suggested location would be somewhere under your source control).

Signatures are based off the unminified source image, so that when the source changes it will be re-minified and re-written to the destination file.


Type: Boolean Default false

If your source is the same as your destination (images are written over themselves), and you want to use the signature checking feature, set this to true

Note: If your source and destination are the same, it's recommended you use this, and options.sigFile, as it prevents you from continually uploading already compressed images each time you run the task


Type: Boolean Default True

With this option you can tell the plugin to override your original file with the compressed one. The gulp.dest() output path for the images is then being ignored.


Type: Boolean Default False

If you want to keep the metadata in the compressed image then you should set this option to true. Because this adds some additional bytes to the compressed file it is disabled by default.


Type: Boolean Default: false

Outputs statistics once all images have been handled.

[09:47:43] gulp-tinypng-extended Skipped: 0 images, Compressed: 1 image, Savings: 3.98 KB (ratio: 0.4109)


Type: Boolean Default: false

Set to true to log errors & messages to the console. Errors are dispatched via events anyway, so plugins like gulp-plumber can handle these for you.


Type: Boolean Default: true

Enables concurrent uploads to the TinyPNG server to speed up total compression time.

(thanks HugoHeneault for this feature suggestion)


Type: Integer Default: 5

The amount of concurrent uploads allowed at one time, increase if you/your request limits can handle it - very easy to max out your monthly requests, use with caution!


Type: Boolean / String Default: false

Force compress images regardless of signature. Value can either be true to force all images, or a glob pattern string to match against the filename(s).

Can also be performed from the command line:

$ gulp png --force 'icon-*.png'

This feature was added as it's impossible to know where the files are being written to at this point in the stream, unless the directory is directly passed into the config (pretty ugly). So the option was added to force certain (or all) files to be compressed when required.


Type: Boolean / String Default: false

Same as options.force except ignores files if the glob is matched

--ignore flag on the command line


Type: Integer Default: 10

How many times to reattempt the upload if an error is encountered.


Type: Integer Default: 10000

How many milliseconds to delay before reattempting a failed upload.

Deprecated/non-functional options

options.checkSigs - Removed in favor of options.sigFile


Please refer to the LICENSE file.

Original license:

MIT © Stan Hutcheon MIT © Gaurav Jassal

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