Image Editing Guides & Tutorials
Plain-language guides for the jobs our tools do — color inversion, film negatives, image compression and more. Every guide is free, practical and tested against the tools on this site.
Latest guides
How to Invert Image Colors — 5 Methods Compared
The complete guide to flipping colors: an online one-click tool, Photoshop, GIMP, your phone, or a line of code — plus when to use each.
Read the guide →Film Negative vs Photo Negative vs Grayscale
Three terms people mix up constantly. What each one actually does to your pixels, when to use which, and how to convert between them.
Read the guide →Compress Images for the Web: The Complete Guide
JPG vs PNG vs WebP, the quality-size tradeoff, and the target-size method for hitting exact limits like 100 KB — without wrecking the picture.
Read the guide →What this blog covers
Negato is a set of free browser-based image tools — no uploads, no watermark, no signup. This blog explains the jobs those tools do: what actually happens to your pixels, which method fits your situation, and where the free online tool beats (or loses to) desktop software.
Every guide is written against the tools on this site and updated when the tools change. If you came here for the tools instead, the full list lives in the tool grid on the homepage — sixteen free utilities covering inversion, film negatives, color editing, geometry, black and white and compression.