File requirements, explained.
Practical steps for size limits, dimensions, formats, and readable documents.
How to compress an image for an upload limit
Set a real KB limit, choose an accepted image format, and keep dimensions and readability under control before submitting a photo.
Why is my PDF too large to upload?
Understand scanned images, searchable text, structural optimization, and the practical ways to reduce PDF upload size without misleading promises.
Image file size, dimensions, and PPI explained
Learn the difference between KB and pixels, convert physical dimensions using PPI, and choose crop or padding for exact image sizes.
JPG, PNG, WebP, HEIC, and AVIF: which should I use?
Choose an image format based on the receiving website, transparency, quality, and compatibility rather than assuming one format is always smallest.
How to prepare photos, signatures, and PDFs for a form
Use a practical checklist for upload format, byte limits, dimensions, readability, page count, signatures, and local processing.