About mo4i
mo4i is a free collection of image, PDF, and text tools that run on your device. No account is required, and files and input text are not uploaded.
Independent Utility Project
mo4i is a free collection of image, PDF, and text tools that run on your device. No account is required, and files and input text are not uploaded.
How It Works On-Device
Selected images are never sent to a remote server; all computation occurs directly inside your local browser. Using the HTML5 Canvas API, the browser decodes the source file, resizes it proportionally within your specified bounding box, encodes it as a JPEG, and verifies the actual byte output.
Limitations and Human Review
This utility adjusts byte weight and bounding dimensions only. It cannot verify biometric composition, lighting, or framing rules, nor does it guarantee acceptance by any specific portal. Users must personally inspect the generated file against their destination requirements.
Operational Notice and Review Date
mo4i is a free tool for adjusting image file size and pixel dimensions before submission. The feature descriptions and guides were reviewed on 2026-09-07 and may change as browser support and external specifications change.