ZeroTools
Zero uploads. Instant browser tools.
Privacy-first utilities that run 100% in your browser. No uploads. No sign-ups. No tracking.
Client-sideRuns in your browser
No uploadsData never leaves
No sign-upUse instantly
Free foreverNo paywalls
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JSON Formatter
Format, validate, and beautify JSON data instantly. Free online JSON formatter with syntax highlighting, error detection, and minification.
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Generators
QR Code Generator
Generate QR codes instantly from any text or URL. Free, fast, and private — download as PNG. No sign-up required.
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Converters
Base64 Encoder
Encode and decode Base64 strings instantly. Free online Base64 tool with support for text and UTF-8. 100% client-side.
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Open source. Privacy first.
Every tool runs entirely in your browser. No data is ever sent to a server. Verify it yourself — the source code is public.