Developer tools
Regex tester, hash generator, cron builder, base64, CSS gradient.
Daily dev utilities — regex with live highlights, hash generator (MD5 / SHA), cron expression builder, base64 encode / decode, CSS gradient and favicon generator.
Latest in this suite
10 fresh tools just shipped
What's in this suite
These are the small utilities you reach for every day — testing a regex against a payload, generating a SHA-256 of a config file, building a cron expression for a scheduled job, or encoding a small image to base64 for an inline data URI. Every tool runs in your browser; nothing is sent to a server, and there's no rate limit, no API key, no signup.
Common workflows
Common pairings: Regex Tester + JSON Formatter when you're parsing logs. Hash Generator + Base64 Encoder for hashing secrets before transmission. Cron Generator + your crontab for setting up Linux cron jobs. CSS Gradient + Color Picker for design-system work.
Frequently asked
Quick answers about the developer tools suite.
Are there rate limits or API keys?
Neither. Every developer tool runs entirely in your browser — no quotas, no keys, no signup. Hash a million strings if you want to.
Which hash algorithms are supported?
MD5, SHA-1, SHA-256, SHA-384, and SHA-512 via the Web Crypto API. (MD5 and SHA-1 are deprecated for security but still useful for non-security checksums and legacy compatibility.)
Does the regex tester support all flavors?
It uses JavaScript's regex engine (ECMAScript). For PCRE-only features (named groups across older browsers, recursive patterns) check the dedicated PCRE testers. JS regex covers ~95% of real-world matching needs.
Can I trust the generated hashes for production use?
Yes — they use the Web Crypto API, which is the same primitive Node.js, Python's `hashlib`, and OpenSSL produce. The output is byte-identical to a server-side hash of the same input.
Explore other suites
Seven more curated collections covering every common workflow.
PDF tools
Compress, merge, split, sign, edit
Image tools
Compress, convert, resize, mask
Finance & tax
EMI, income tax, GST, UPI, HRA
JSON & data
Format, validate, convert, diff
Document tools
PAN, Aadhaar, signature, redact
Privacy & security
Mask, redact, password, encrypt
Everyday utilities
QR, URL, color, text, time