~ cat welcome.txt
Dev Tools Online
Free Developer Tools — No Tracking, No Signup, All Client-Side
~ ls tools/
~ █
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text.
URL Encoder / Decoder
Encode or decode URLs and query string parameters.
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 strings.
Regex Tester
Test and debug regular expressions with real-time match highlighting.
JSON to CSV Converter
Convert JSON arrays to CSV format for spreadsheet use.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
// WHY_USE_DEV_TOOLS_ONLINE
Client-Side Only
Every operation runs in your browser. Hashes, encodings, and transformations never touch a server. Safe for sensitive development data.
Zero Latency
No network round-trips. Results are computed locally and appear instantly — hash a string, encode a URL, format JSON in milliseconds.
Free & Open Access
No API keys, no rate limits, no account required. Just open the tool and use it — exactly how developer utilities should work.
Works Offline
Once a page has loaded, most tools continue to function without an internet connection. Build and debug anywhere.
Purpose-Built Tools
Each utility is focused on one job done well — no bloated all-in-one interfaces, no unnecessary options, just clean, direct functionality.
One-Click Copy
All output fields include a copy button. Get your result into the clipboard and back into your code editor without any mouse gymnastics.
// HOW_IT_WORKS
Select a Utility
Pick the tool you need from the grid — hash generator, URL encoder, Base64 converter, regex tester, JSON-to-CSV, or timestamp converter.
Enter Your Input
Paste a string, upload data, or type directly. Most tools process in real time — no submit button needed.
Copy the Output
Click the copy button to grab the result. Paste directly into your terminal, code editor, or API client.
// WHO_USES_THIS
Generate and verify hashes for data integrity checks, encode/decode Base64 tokens, and convert Unix timestamps during API debugging.
Encode configuration values for environment variables, test regex patterns for log parsing rules, and verify URL encoding in CI/CD scripts.
Generate test data with Lorem Ipsum, convert data formats between JSON and CSV, and verify hash outputs for fixture files.
Explore hashing algorithms, practice URL encoding, and experiment with Base64 encoding as part of cryptography and web development coursework.
// FAQ
Is my data sent to your servers?
No. All processing is client-side. Your input never leaves your browser — hashes are computed locally, encodings happen in memory, and nothing is transmitted to any server.
Are these tools safe for sensitive data?
Processing is local, so data doesn't transit the network. That said, as a general security practice, avoid entering production secrets, private keys, or credentials into any online tool.
Which hash algorithms are supported?
The hash generator supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512. Check the tool page for the current full list.
Can I use these tools offline?
Yes. Once a page has loaded in your browser, most tools continue to work without an internet connection since all logic runs client-side.
Are the results accurate enough for production use?
Our tools are designed for accuracy. However, always verify critical output independently before using it in production systems or security-sensitive contexts.
Do I need to install anything?
No installation required. All tools run in any modern browser — Chrome, Firefox, Safari, or Edge — on desktop or mobile.