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How to Encode and Decode Base64 Online — Text and Data Guide
Learn how Base64 encoding works, when to use it, how to decode it, and why Base64 is not encryption.
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How to Decode JWT Tokens Online — Header, Payload and Signature
Learn how JWT tokens work, how to decode their header and payload, and why signature verification requires a key.
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How to Generate UUIDs Online — v4 IDs for Apps and Databases
Learn what UUIDs are, when to use them, and how UUID v4 helps create unique identifiers for apps and databases.
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How to Test Regex Online — Patterns, Matches and Debugging Tips
Learn how to test regex patterns online, debug matches, understand escaping, and avoid common regular expression mistakes.
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How to Convert Unix Timestamps Online — Epoch Time Guide
Learn how Unix timestamps work, how to convert epoch time to dates, and how to avoid seconds vs milliseconds and timezone mistakes.
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How to Generate Hashes Online — MD5, SHA-1, SHA-256 and SHA-512
Learn how hash generators work, when to use MD5, SHA-1, SHA-256 or SHA-512, and why hashing is different from encryption.
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How to Convert PDF to JPG Online for Free — Page Images Guide
Learn how to convert PDF pages into JPG images online for free, when to choose JPG or PNG, and how to keep page images clear.
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How to Convert PDF to Word Online for Free — Editable DOCX Guide
Learn how to convert PDF files into editable Word documents, what affects formatting accuracy, and when PDF to DOCX is the right choice.
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How to Crop an Image Online for Free — Aspect Ratio and Size Guide
Learn how to crop images online, choose the right aspect ratio, remove distractions, and prepare pictures for social media or documents.
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How to Convert Images to PDF Online for Free — JPG, PNG and WebP Guide
Learn how to turn JPG, PNG and WebP images into a PDF document for sharing, printing, scans, forms and organized image collections.
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How to Convert an Image to WebP Online for Free — JPG, PNG and WebP Guide
Learn how to convert images to WebP online for free, when to use WebP instead of JPG or PNG, and how to reduce image file size for faster websites.
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How to Resize an Image Online for Free — Pixels, Quality and Social Sizes
Learn how to resize an image online for free, choose the right pixel dimensions, avoid stretched photos, and prepare images for websites, email and social media.