Developer Tools

Development work is punctuated by small conversions and checks that are not worth writing a script for but are tedious by hand. This category covers twelve of the most common. The JSON Formatter & Validator pretty-prints a minified payload and points to the exact character where a document is malformed. The Universal Encoder / Decoder handles Base64, URL encoding, HTML entities and image data URIs in one interface. The Hash Generator produces MD5, SHA-1, SHA-256 and SHA-512 digests for checksums and integrity comparisons. The CSS Minifier strips whitespace and comments before deployment, while the HTML Beautifier does the reverse for markup you need to read. The Unix Timestamp Converter translates epoch seconds and milliseconds into readable dates and back. JSON to CSV, the CSV Data Cleaner, the Markdown Previewer, the Case Shifter for switching between camelCase, snake_case, kebab-case and PascalCase, the HEX to RGB Converter and the Password Strength Tester round out the set.

When an API response will not parse, run it through the JSON Formatter first: the validator will usually identify a trailing comma or an unescaped quote faster than reading the raw string. If you are debugging a token or a query parameter that looks like gibberish, the Universal Encoder / Decoder will tell you whether it is Base64, percent-encoded, or genuinely opaque. Use the Hash Generator to confirm that a downloaded file matches its published checksum, and remember that MD5 and SHA-1 are fine for that purpose but should not be used for password storage or signatures. The Case Shifter is the quickest way to move a set of field names between a database convention and a JavaScript convention. Before shipping, the CSS Minifier reduces stylesheet size, and the CSV Data Cleaner is the practical answer to a spreadsheet export full of stray whitespace, blank rows and duplicated records.

Developer tools are the category where server-side processing is most dangerous, because the strings being pasted are so often secrets. API keys, JSON Web Tokens, connection strings, session cookies and configuration files get dropped into online formatters every day, and each paste is a potential credential leak into somebody else's logs. Every tool in this category runs its logic in your browser through standard Web APIs, including the built-in SubtleCrypto interface used for SHA hashing. Nothing is posted to an endpoint, so a token you decode here does not end up in an access log or a database. If you want to verify that claim, open your browser's network tab while using any of these tools: you will see the page and its stylesheet load, and then no further requests as you work.