Short, practical walkthroughs written from the questions people actually ask us. No jargon, no fluff, just how to get the file you need.
Almost every file problem that sends somebody looking for a tool falls into one of three groups. The first is a size limit: a portal, an exam form or an email system refuses your file because it is too big, and you need it under a specific number of kilobytes without making it unreadable. The second is a format mismatch: you have a HEIC photo from an iPhone and the site only takes JPG, or a WebP download that your software will not open. The third is data trapped in the wrong shape, such as a table locked inside a PDF bank statement when what you need is a spreadsheet you can sort and total.
The guides below work through each of those in plain language. They explain why the problem happens, which numbers actually matter, and the trade you are making when you compress or convert. Where a guide refers to a tool on this site, every one of them runs in your own browser, so the file you are fixing never gets uploaded anywhere. That matters most for the documents people most often need to shrink: bank statements, passports, ID scans and signed contracts.
Compressing a photo for online forms
Hit a 20, 50 or 100 KB photo limit for exam, visa and job portals — without wrecking the image.
Why portals reject your PDF
What "file must be under 200 KB" really means and how to meet any PDF size limit.
PDF bank statement to Excel
Get transactions out of a statement and into a spreadsheet — accurately and privately.
JPG vs PNG vs WebP
Which image format to use, when, and what you gain or lose by converting.
Cleaning a messy CSV
Fix duplicates, blank rows and delimiter chaos before importing into Excel.
HEIC vs JPG
Why iPhones use HEIC, when to convert to JPG, and what you gain or lose.
Reduce image size without losing quality
Practical ways to shrink a photo while keeping it sharp.
WebP vs AVIF
The two modern image formats compared — support, size and when to use each.
Remove metadata from photos
What EXIF and GPS data your photos carry, and how to strip it before sharing.
Where to start
If you are facing a deadline on a form right now, read the size guide that matches your file type and go straight to the tool it links to. If you are deciding how to store or send images in general, start with the format comparisons instead, because choosing the right format once saves you from compressing the same photo over and over. The CSV and bank statement guides are worth reading before you paste anything into a spreadsheet, since most import problems are easier to prevent than to fix afterwards.
A note on privacy
Every tool mentioned in these guides processes your file on your own device. Nothing is sent to a server, nothing is stored, and no account is needed. You can check this yourself: load any tool page, disconnect from the internet, and the compression or conversion still works. That is the whole reason this site is built the way it is.