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jpeg-recompress 2.1.1

Cut JPEG file sizes by 50% or more

by Mike Williams

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License: Open Source
Operating Systems: Linux, Mac OS X, Windows 10, Windows 7 (32 bit), Windows 7 (64 bit), Windows 8, Windows Server
Requirements:
Languages: English
Software Cost: Free
Date Updated: 27 October 2016
Watchlist: Add download to my watchlist
Downloads To Date: 1362
Developer: Daniel G Taylor
RSS News Feed: https://github.com/danielgtaylor/jpeg-archive/commits/master.atom
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jpeg-recompress
Cut JPEG file sizes by 50% or more

Jpeg-recompress is a command-line tool which can cut JPEG file sizes by 50% or more.

The program works by intelligently selecting the lowest possible quality setting for your JPEG, which also has the minimum effect on its perceived visual quality.

The command line syntax is straightforward, and at a minimum you can get away with this.

jpeg-recompress in.jpg out.jpg

This tells jpeg-recompress to take the image in.jpg and process it at several lower quality levels. At each stage the program uses the structural similarity (SSIM) algorithm to measure the change in your image, and finally selects the lowest level that still gives you acceptable results.

We tried this out with a few sample HD photos. Processing was faster than we expected, 5 or 6 seconds to find the best quality level and save the image. File sizes were typically 50% to 25% of the original. Most important of all, there was no apparent difference between the "before" and "after" files.

If this doesn't quite work for you, there are various options to try. You could use a different algorithm to check your images, set a new "acceptable" quality level to further shrink the files, and there's a "strip metadata" switch to save the maximum amount of space.

Please note: the project download is "jpeg-archive", but jpeg-recompress is one of the bundled files.

Verdict:

Jpeg-recompress is an interesting tool which can deliver spectacular results, significantly cutting file size while losing minimal image quality. If you don't mind running it from the command line, or are happy to set up your own scripts, it's a must-see.

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Spotlight: Free Full Software

WhatsApp Messenger 2.19.11

Free Full Commercial Software

WhatsApp Messenger is the world's most popular instant messaging app for smartphones.

You can use it to send and receive text and voice messages, photos, videos, even call your friends in other countries, and because it uses your phone's internet connection it might not cost you anything at all (depending on whether you'll pay data charges).

It's easy to set up and use. There's no need to create and remember new account names or pins because it works with your phone number, and uses your regular address book to find and connect you with friends who use WhatsApp already.

You can talk one-to-one or in group chats, and because you're always logged in there's no way to miss messages. Even if your phone is turned off, WhatsApp will save your messages and display them as soon as you're back online.

There's plenty more (location sharing, contact exchange, message broadcasting) and the app is free for a year, currently $0.99/ year afterwards.

What's New in Version 2.19.11 

• You can now reply to a group message privately in your 1:1 chat. Tap and hold a message in a group chat and select "More", then "Reply Privately".
• When editing a photo or video, you can tap the smiley icon to add stickers. 
• From the Status tab, you can now 3D touch to preview a contact's status.

[...]
Value:
Free
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