Compress image using sharp in node.js

Question

I want to resize and compress images using sharp in node.js

In sharp for jpeg there is separate compression and for webp there is separate and for png there is separate.

WEBP

sharp('a.jpg')
.resize(1000)
.webp({quality: 80})

JPEG

sharp('_4_.jpg')
 .resize(1000)
 .jpeg({quality: 80})

PNG

sharp('_4_.jpg')
 .resize(1000)
 .png({compressionLevel: 8})

Basically I want to compress and resize image without checking in which format they.

Is there anything for that in sharp ?

Why don't you just check the extension and act accordingly? If you want a more precise detection you can read the first bytes of the image, but I don't think that is necessary. — Marcos Casagrande, Jul 11 '18 at 18:03
yes that's a solution but i want to do same instead of checks — Haseeb Ahmad, Jul 11 '18 at 18:12
different formats require different method decoding and encoding, so checking extension is a good idea. — primee, Sep 25 '18 at 15:58

score 4 · Answer 1 · answered Aug 16 '19 at 21:46

If you want the output format to match the input format, you should look at force option.

sharp(input)
  .jpeg({ progressive: true, force: false })
  .png({ progressive: true, force: false })
  ...

GIF output is not supported, so GIF input will become PNG output by default.

1 Answers1