Privacy-first local processing

Free browser tools

Fast utilities for everyday work. Processing happens in your browser without uploading your input or requiring an account.

JSON FormatterFormat nested JSON with readable indentation.Open tool →JSON ValidatorValidate JSON syntax and locate malformed input.Open tool →Base64 EncoderEncode UTF-8 text into Base64 in your browser.Open tool →Base64 DecoderDecode a Base64 value back to UTF-8 text.Open tool →JWT DecoderInspect JWT header and payload locally. Signatures are not verified.Open tool →UUID GeneratorGenerate cryptographically secure UUID v4 identifiers.Open tool →Hash GeneratorCreate SHA-1, SHA-256, SHA-384 or SHA-512 digests.Open tool →Password GeneratorGenerate strong random passwords without sending data to a server.Open tool →Regex TesterTest a JavaScript regular expression and inspect every match.Open tool →Timestamp ConverterConvert Unix timestamps and ISO dates with timezone detail.Open tool →URL EncoderEncode text safely for use in a URL component.Open tool →URL DecoderDecode a percent-encoded URL component.Open tool →Meta Tag GeneratorGenerate SEO, canonical and Open Graph tags from structured input.Open tool →Robots.txt GeneratorCreate a robots.txt policy with sitemap discovery.Open tool →Sitemap GeneratorBuild a valid XML sitemap from one URL per line.Open tool →QR Code GeneratorGenerate a downloadable PNG QR code locally in your browser.Open tool →

Choose a tool for your next task

Format and validate JSON, encode text, inspect tokens, generate identifiers and QR codes, or prepare website metadata. Each tool includes practical examples and limitations so you can choose the right operation without an account.

Local processing, clear boundaries

These tools process your input in your browser, including QR generation. Page resources load from ConviaHub, but your input is not submitted. Copying and downloads happen on your device; hashing requires a secure browser context.