Guides
Short how-to guides for jobs our tools help with. Each one works through a real example step by step, says where things usually go wrong and links to the tool for the job. You don’t need to install anything, and the files you use stay on your device.
Documents, images and video
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How to redact a screenshot before sharing
Cover private details with solid boxes, not blur, and catch what people usually miss.
Uses: Redact a Screenshot
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How to fix subtitle timing and convert SRT to VTT
Shift late subtitles, fix overlapping captions and convert between SRT and WebVTT.
Email, data and code
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How to read DMARC aggregate reports
Find every service sending as your domain, fix alignment failures and plan the move to p=reject.
Uses: DMARC Report Analyzer
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