XConvert processes files in the cloud: its own page credits a robust cloud infrastructure and its footer counts tens of terabytes of files uploaded. For compressing images and PDFs, a browser-based toolkit does the work on your own device, so nothing is uploaded.
Free online image compressor. Re-encode JPG and PNG photos at a quality you choose to shrink file size, and see how much you saved. Private.
Open Image Compressor → Free toolFree online PDF compressor. Re-save a PDF to trim its file size in your browser and see the before and after numbers. Private, nothing uploaded.
Open Compress PDF →XConvert is a broad converter and compressor, and its own site says files are processed by a robust cloud infrastructure, with a live counter of the many terabytes of files uploaded. That means your file is sent to its servers. Client-side tools compress an image or a PDF directly in your browser, re-encoding the image or shrinking the document locally, so there is no upload and nothing waiting to be deleted.
Local processing is the safer default when the file is private, and it is instant because there is no upload queue. XConvert also handles video and audio, which genuinely need heavier tooling; for the everyday jobs of compressing an image or a PDF, the free browser tools cover them with no account and no upload.
No. Compression runs in your browser, so the file never leaves your device.
Compressing images and compressing PDFs, all processed locally.
No. The tools work immediately with no sign-up.