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PeaZip is a free cross-platform file manager and image editor that provides an unified portable GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX... free alternative to WinRar, WinZip and similar proprietary software.
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP files
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more, over 180 archive types supported
Features of PeaZip includes: view and edit jpeg, png, bmp, tiff images (rotate, flip, mirror, convert, resize, crop, fit to screen), batch creation and extraction of multiple archives at once, convert files, split and join files, strong encryption with two factor authentication, encrypted password manager, secure delete, find duplicate pictures, export job definition as script. |
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PeaZip file manager and image viewer can be used as batch image editor utility, providing a basic set of tools to (batch) edit graphic file types, accessible from application's context menu and selecting Image manager tool bar.
Rotate images left / right
The first area of batch editing and management tool bar contains rotate images left / right (rotate the picture counterclockwise / clockwise) buttons and a dropdown menu with more rotation features (rotate image 180°, flip image vertically and mirror horizontally), i.e. for setting correct portrait / landscape orientation of photoes and graphic files.
Crop images
Crop images button opens a dialog that allows to crop images at each side (top, bottom, left, right) of selected images of a given amount, expressed in percentage or in pixels. This utility allows to reduce the size of the graphic file removing unnecessary data and keeping the desired area, and to improve the quality of the picture i.e. regulating the offset of a photo on each side.
Transform button opens a dialog to batch resize and/or convert selected images.
Resize images (scaling and fit to screen)
Picture transformation dialog allows to resize images to a specified pixel size or resize the picture to specified percentage, either maintaining aspect ratio (keeping proportion between width and height sizes) or applying a deformation to the image - either expressed as new pixel width and height, or as percentage of the two dimensions of the image.
Resizing pictures greatly reduces the disk space occupation of images, as a 50% scaling will halve height and witdth, reducing the final image area to 25% of the original one, employing 1/4 of original number of pixel to represent the resized image which will consequently occupy 1/4 of uncompressed size - reduction of compressed size will vary.
Alternatively, transformation can fit the image to specified screen size, reducing the image width and height in order to be completely contained in the provided screen size, or let the original picture size and proportions unchanged.
Read more about crop images and resize images (scaling) on Wikipedia.
Convert graphic file format i.e. PNG to JPEG
Convert image format function in transformation dialog allows to save the input graphic file in the specified output file format: JPEG, PNG or BMP (raw RGB bitmap file).
For JPEG format it is available a dialog to set lossy JPG compression quality from 0 to 100, lower quality provides better compression ratio, but introduces more JPG compression artifacts.
Conversely, high quality JPG images will occupy more space on disk.
The dropdown menu on the right of Transform button provides quick access to most common image transformation operations: resize to a given percentage, fit image to most common screen sizes, convert picture to JPG, or PNG, or BMP format.
Whenever a graphic file (or group of pictures) is modified, the user is prompted to overwrite or preserve original files, automatically renaming new transformed graphic files - this is especially useful as most operations on pictures involves lossy algorithms to be applied, which cannot be inverted to restore the original graphic data if the original copy was not kept.
Last area contains Find duplicate files, a fast crc/hash based deduplication tool to batch highlight identical picture files, Rename button, and file management dropdown menu to complete the toolbar providing additional useful features to manage collections of images or photo.
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FAQ > File management > How to batch convert, resize, crop, rotate images using PeaZip as graphic editor
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