Base64 Encoder / Decoder
Encode and decode text as Base64, with a URL-safe variant and full UTF-8 support. Runs in your browser; your text is never sent anywhere.
Engineering
Tools
Minimal, fast developer tools that run entirely in your browser. No data is ever sent to a server.
Encoding
Formatter
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JSON Formatter
Format JSON with 2-space, 4-space or tab indentation, or minify it; invalid JSON gets an error message. Runs in your browser; your data never leaves it.
Generator
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Password Generator
Cryptographically secure password generator: set the length and character classes, and optionally exclude look-alike and shell characters. Runs in your browser.
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gitignore Generator
Generate a .gitignore from your project folder. Unlike the competition, nothing is uploaded — not even the file names ever leave the page.
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UUID Generator (v4 & v7)
Generates UUID v4 (random) and v7 (time-ordered, RFC 9562), one at a time or in bulk. Runs in your browser with the Web Crypto API; nothing is sent anywhere.
Parser
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JWT Decoder
Decodes a JWT header and payload and shows the exp and iat claims as ISO timestamps. It does not verify the signature; the token stays in your browser.
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.env Parser
Splits dotenv content into a key/value table, flags invalid lines, and masks values of sensitive keys such as secret, token and password. Runs in your browser.
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URL Parser
Breaks a URL into protocol, host, port, pathname, hash and credentials, and lists its query parameters in a table. Runs in your browser; the URL stays there.
Reference
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Backoff & Jitter Calculator
Compute an exponential backoff schedule and see how full, equal, and decorrelated jitter spread the retries. Client-side, nothing is retried.
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HTTP Status Codes Reference
What common HTTP status codes mean and where each shows up. Search by code, name or keyword. Runs in your browser; nothing you type is sent anywhere.
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JSON Schema Backward-Compatibility Diff
Diff two JSON Schemas: is the change backward-compatible, or a breaking one that needs a new message version? Runs in your browser.
Time
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Unix Timestamp Converter
Convert both ways between Unix timestamp and ISO 8601. Seconds and milliseconds are auto-detected; shows UTC, local and relative time. Runs in your browser.
Visual
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Code Image Generator
Turn a code block into a shareable PNG. The code itself never leaves your browser; pick a theme, export scale, and window chrome.
Practice
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Typing Speed Test
Measures Turkish and English typing speed honestly: CPM is the primary metric, and a code mode exercises real brackets and template syntax.