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Free Developer Tools

JSON, hash, encryption, timestamp, URL encoding, regex, IP tools — all browser-based, no data sent to servers

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JSON Formatter & Validator

Format, validate, minify and explore JSON with tree view and syntax highlighting.

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Online
Hash Generator

Generate MD5, SHA-256, SHA-512, CRC32 hashes for text or files.

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Encrypt & Decrypt Text

Caesar, ROT13, Vigenere, AES-256, Morse Code, Base64 and more.

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Unix Timestamp Converter

Convert Unix timestamps to human dates and vice versa. Timezone support.

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IP Address & Subnet Tools

IP converter, subnet calculator, CIDR, binary/hex/decimal conversion.

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Binary / Hex / Octal Converter

Convert between binary, octal, decimal, hex and any base 2–36. Bit view included.

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ASCII & Unicode Lookup

Get decimal, hex, HTML entity, UTF-8 bytes for any character or string.

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URL Encoder & Decoder

Encode and decode URLs, query strings and Base64 instantly in your browser.

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Regex Tester

Test regular expressions with live match highlighting, group capture and replace mode.

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Developer Tools that Respect Your Privacy

Every tool in this collection processes your data entirely in the browser. No code, no hashes, no text and no network packets are sent to our servers — making them safe to use with sensitive data.

Did You Know?

256-bit
AES Key Length
AES-256 uses a 256-bit key — there are more possible keys than atoms in the observable universe. It would take longer than the age of the universe to crack by brute force with current technology.
1970
Unix Epoch Start
Unix timestamps count seconds from January 1, 1970 (UTC) — chosen because it was the approximate start date of Unix development. The Y2K38 problem occurs when 32-bit timestamps overflow on January 19, 2038.
128
ASCII Characters
The original ASCII standard defined 128 characters (0–127), including 95 printable characters. ASCII was first published in 1963 and remains the foundation of modern character encoding — all Unicode is backward-compatible with ASCII.

Common Questions

Are the developer tools suitable for production use?
Yes. All tools implement well-established algorithms and browser-standard APIs. The Hash Generator uses Web Crypto API, the JSON formatter uses native JSON parsing, and the regex tester uses the browser's built-in RegExp engine.
Can I use the encryption tools for real security?
The AES-256 encryption tool uses the browser's Web Crypto API, which is the same cryptographic standard used in HTTPS. It is suitable for personal use. For enterprise security, consult a security professional.
Is my code or data logged when I use developer tools?
No. All developer tools run entirely in your browser. JSON you format, text you hash, regular expressions you test and URLs you encode are never transmitted to our servers.
Do these tools work offline?
Most developer tools work offline once the page has loaded, because they use no external APIs. The exception is the Currency Converter which fetches live exchange rates.