Practical guides to file formats and conversions.
Which format to pick, how to shrink files without wrecking them, and how to do common PDF and document jobs without installing anything — with tools that keep your files on your device.
Images
Formats, compression, and conversions for photos and graphics — HEIC, JPG, PNG, WebP, and AVIF.
How to Open HEIC Files on Windows
HEIC photos from an iPhone won't open on Windows out of the box. Here are every free and paid way to view them — plus how to convert HEIC to JPG in your browser.
Read the guideHow to Convert iPhone Photos (HEIC) to JPG on Any Device
Every way to turn iPhone HEIC photos into universal JPGs — on the iPhone itself, Mac, Windows, Android, Linux, or straight in your browser with no software.
Read the guideWebP vs JPG: Which Should You Use?
WebP files are typically 25–34% smaller than JPEGs at the same quality — but JPG still wins in some situations. A practical comparison with a decision table.
Read the guidePNG vs JPG: When Each Format Wins
PNG is lossless and supports transparency; JPG makes photos dramatically smaller. Learn exactly which format to use for screenshots, photos, logos, and the web.
Read the guideAVIF vs WebP: The Modern Image Format Showdown
AVIF compresses harder; WebP encodes faster and is supported everywhere. A practical, benchmark-informed comparison for choosing your next-gen image format.
Read the guideHow to Reduce Image File Size for Email and the Web
Photos too big to email or slowing down your site? Learn the two levers that actually shrink images — resizing and compression — and the settings that keep them looking good.
Read the guideMerging, splitting, and working with PDF documents without paid software.
How to Merge PDF Files Without Installing Software
Combine PDFs in your browser without Acrobat or any download — and without uploading sensitive documents to someone's server. Plus the built-in OS alternatives.
Read the guideHow to Extract Specific Pages from a PDF
Pull just the pages you need out of any PDF — in your browser, with built-in OS tools, or the print dialog trick. No Acrobat, no uploads, no watermarks.
Read the guideDocuments & Data
Spreadsheets, OCR, and turning documents into data you can actually use.
How to Convert Excel (XLSX) to CSV Without Excel
No Excel license? Convert spreadsheets to CSV in your browser, with Google Sheets, LibreOffice, or the command line — plus the encoding gotchas that mangle your data.
Read the guideWhat Is OCR? How to Extract Text from Scans and PDFs
OCR turns pictures of text into real, searchable, copyable text. How it works, what accuracy to expect, the free tools built into your devices, and how to run it online.
Read the guideSkip Ahead
Already know what you need? Convert it now.
Core conversions run instantly in your browser — no signup, and files never leave your device.