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ConvertKit

Practical guides for files you actually work with.

Format comparisons, compression targets, and step-by-step PDF and document workflows — each guide answers a real question with concrete numbers and a repeatable process, then links to the tool that does the job.

These are the questions that reach us through the contact form and that we hit ourselves while building and testing the converters: which format survives email, why a scan comes out sideways, where quality is actually lost when an image shrinks. Each guide is written by the team that maintains the tools, organized the way the work happens — decide, do, verify — and reviewed when the formats underneath change. Every article shows when it was published and when it was last updated, so you can judge for yourself how current the advice is.

Nothing here is sponsored or ranked by partnership: the recommendations are the ones we use in our own workflows. If a guide sent you here and the tool does not cover your case yet, tell us — missing cases become the next guide.

Image formats & optimization

Which format to pick, how far compression can go, and how to fix the files your phone or camera gave you.

PDF workflows

Everyday document surgery — combining, extracting, and reorienting pages without re-rendering or degrading them.

Documents & publishing

Turning working formats into shareable ones, with the fidelity pitfalls that quietly ruin exports.