Tools for Developers
Every developer has a set of micro-tasks they repeat dozens of times a day: formatting JSON, testing a regex, comparing two config files, decoding a Base64 string. Having the right browser tools eliminates the context switch of writing a one-liner or spinning up a script. All tools below are free, client-side, and require no sign-up.
Base64 Encoder / Decoder
Encode strings, binary data, or file contents to Base64 for safe transmission over text-only protocols, or paste a Base64 token to decode it instantly. Used daily when working with JWTs, API credentials, and data: URIs.
URL Encoder / Decoder
Encode special characters for safe use in query strings, or decode percent-encoded URLs to human-readable form. Essential when debugging web requests and constructing API calls by hand.
Unicode Converter
Convert between Unicode code points, HTML entities, and raw characters. Indispensable for internationalisation (i18n) work and debugging character encoding issues in text pipelines.
Hex Converter
Convert text, numbers, or byte arrays to hexadecimal and back. Useful for colour codes, binary protocol debugging, and reading memory dumps.
JSON Formatter & Validator
Paste raw or minified JSON and get a pretty-printed, syntax-highlighted view. The validator catches structural errors like missing commas or unmatched braces before they reach production.
JSON to YAML Converter
Most Kubernetes manifests, CI pipelines, and Helm charts live in YAML. This tool converts a JSON document to YAML in one click — no manual reformatting.
JSON to XML Converter
Legacy integrations and some enterprise APIs still require XML. Convert JSON payloads to well-formed XML without writing any XSLT or code.
JS Beautifier
Unminify or reformat JavaScript in seconds. When you pull down a minified library or receive obfuscated code, this tool makes it readable again immediately.
RegExp Tester
Write and test regular expressions in real time against a sample string. Matches are highlighted as you type. Supports flags like global, case-insensitive, and multiline. Cuts the trial-and-error cycle when building validators or log parsers.
Code Diff Tool
Paste two blocks of code or config side by side and get a highlighted line-by-line diff. Faster than running git diff for quick comparisons during code review or incident response.
WebSocket Tester
Connect to any WebSocket endpoint and send / receive messages directly in the browser. Test real-time services and event streams without installing wscat or writing a custom client.
Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and vice versa. Indispensable when reading server logs, debugging API responses, and writing time-based database queries.
Character Counter
Count characters, words, and bytes in any text block. Useful for staying within field-length limits, tweet character caps, and database column constraints.
Duplicate Line Counter
Paste any list and instantly find or remove duplicate entries. Faster than a sort | uniq one-liner when working with large, messy lists or CSV exports.
Crontab Calculator
Validate cron expressions and see a plain-English explanation plus the next 10 execution times. Prevents the classic "it ran at 3 AM instead of 3 PM" deployment surprise.
MD5 / Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any string. Verify checksums, test hash comparisons, and debug HMAC signatures without writing a script each time.
AES Encryptor
Encrypt and decrypt text using AES-256 with a passphrase. Useful for testing encryption implementations and protecting sensitive data snippets during development.
RSA Encryptor
Encrypt data with an RSA public key or decrypt with a private key. Helps verify key pairs and understand RSA padding schemes without writing boilerplate crypto code.
DES Encryptor
DES is a legacy cipher still found in older enterprise systems. Use this tool to test DES-encrypted payloads during integration work with legacy services.
Password Generator
Generate cryptographically strong random passwords with configurable length, character sets, and entropy. Use when provisioning service accounts, rotating credentials, or generating API secrets.
Code to Image
Convert code snippets into clean, shareable images for documentation, blog posts, pull request descriptions, or social media — without screenshotting your entire IDE.
QR Code Generator
Generate QR codes for URLs, text payloads, or configuration strings — useful for documentation, printed materials, and internal tooling dashboards.
Color Converter
Convert colours between HEX, RGB, HSL, and other formats instantly. Essential when translating design tokens into CSS or verifying colour values across different systems.
cURL Converter
Convert cURL commands into structured request breakdowns, or build cURL commands from scratch. Excellent for documenting API endpoints and sharing reproducible HTTP requests with teammates.
XMind Converter
Convert XMind mind-map files to other formats — useful for exporting architecture diagrams and planning documents from XMind into a format you can embed in docs or wikis.
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