FAQ — Compress files to a size limit
Many upload forms cap files at a maximum size (for example, "under 500 KB" or "max 2 MB"). On the home page, enable Specify Target Size, enter your limit and pick KB or MB (or a preset), and the compressor fits the file to your budget while keeping it readable.
Frequently asked questions
How do I compress a PDF to under 500 KB?
Open the PDF tab, turn on Specify Target Size, enter 500 and choose KB, then compress. The result shows whether it met the target.
Which formats support a target size?
PDF, images and video support compressing to a target size. GIF, audio and SVG are optimized by quality level only (no size target).
Is it free and do I need an account?
Yes, it is free and no signup is required.
Are my files kept?
No. Uploaded and compressed files are automatically deleted after processing.
Will compressing reduce quality?
Compression trades some quality for smaller size. Target-size mode reduces quality or resolution only as much as needed to fit your limit while keeping the file readable.
Which file formats are supported?
PDF, JPG/PNG/TIFF/BMP images, MP4/MOV video, MP3/WAV audio, GIF and SVG.