How the Image Compressor works
The Image Compressor has one concrete job: compress JPG, JPEG, and PNG images with a live quality preview, original dimensions, and batch downloads. It decodes each file once, resizes only when requested, and encodes JPEG or PNG locally at the selected settings. Controls stay beside the preview so the setting that changes the output is visible before download. The original file is never overwritten, and the result receives a descriptive filename.
When to use this free online image tool
Typical uses include smaller website assets, email attachments, social posts, and storage-friendly photo copies. Start with one representative file, compare the preview with the source, and then process the rest of a batch. Keep source files until the exported copy has been checked at its real destination because websites, social platforms, email clients, and print software may resize or recompress the same image differently.
Privacy, quality, and practical limits
Files are processed locally in the current browser tab whenever the format is supported. NexaCurrent does not need an upload endpoint, and image contents are not placed in the URL. Closing or refreshing the tab clears the working state. The important format limit is explicit: JPEG quality is adjustable; PNG optimization is lossless-first and results vary with image complexity.
Decoded pixels can use far more memory than a compressed JPEG or PNG file suggests. The workspace therefore caps file size, pixel count, batch count, and GIF frames, then reports a readable error instead of allowing the tab to fail silently. For critical brand, archival, print, forensic, legal, or accessibility work, validate the export in the specialist software and standards used by that workflow.