100% Free Online Utilities • No Sign-Up
Free Online Security & Cryptography Tools
Generate high-entropy random passwords, compute SHA-256 hashes, create UUIDs, and encode Base64 client-side.
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Free Password Generator
Generate strong, cryptographically secure passwords with entropy meter.
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Free SHA-256 Hash Generator
Calculate SHA-256, SHA-512, and SHA-1 cryptographic hashes.
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100% FreePopular
Free UUID / GUID v4 Maker
Generate bulk random UUID v4 database identifiers.
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100% Free
Free Base64 Encoder / Decoder
Encode and decode Base64 strings safely in browser.
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100% Free
Free URL Percent Encoder
Percent-encode special URI characters for web query strings.
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Why Choose ConvertStuff Free Online Security & Cryptography Tools?
100% Free Forever
No hidden subscriptions, no daily limits, and no paid tiers. Every conversion is completely free with no watermarks.
Zero-Log Local Sandbox
All files are processed in your browser memory via WebAssembly. Your documents and photos never leave your device.
Instant High Speed
Eliminate server upload delays. Conversions finish in under 2 seconds directly on your device CPU.