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Popular Utility Tools

JSON FormatterPaste JSON and format it locally with 2, 4, or 8-space indentation, optional key sorting, syntax diagnostics, copy, and download output. Essential for developers debugging API payloads, reviewing configuration files, and preparing JSON for readable diffs in version control.structured-data / FormattersTry it
Text Diff CheckerCompare two text versions locally with side-by-side or inline highlights for added, removed, and changed lines before copying the reviewed diff. Essential for developers reviewing code changes, writers tracking document revisions, and anyone comparing text versions without a Git repository.text-content / ComparatorsTry it
Base64 Text EncoderEncode browser text as UTF-8 bytes and RFC 4648 standard Base64, with exact Unicode handling, byte count, copy, text-file import, and download. Ideal for developers preparing payloads for APIs, data URIs, email attachments, and authentication headers. Handles full Unicode range with transparent byte counting.code-web / EncodersTry it
Base64 UTF-8 DecoderDecode standard Base64 or unpadded Base64URL text locally, normalize whitespace and padding, reject malformed alphabet data, and require the decoded bytes to be valid UTF-8. Useful for developers, analysts, and anyone working with encoded API responses, JWT tokens, or data URLs. Supports both padded and unpadded variants with instant browser-side processing.code-web / DecodersTry it
RFC 3986-Style URI Component EncoderEncode an entire input string as one UTF-8 URI component with encodeURIComponent plus explicit escapes for !, apostrophe, parentheses, and asterisk. Useful for developers building query strings, constructing API URLs, and preparing user input for safe transmission in web addresses.code-web / EncodingTry it
HTML Formatter with PreviewIndent HTML source by 2, 4, or 8 spaces, collapse it with the minify option, and inspect the original input through a DOMPurify-sanitized sandboxed preview. Helpful for developers debugging templates, reviewing generated markup, and preparing HTML for version control diffs. Catches structural issues early.code-web / MarkupTry it
Password and Passphrase GeneratorGenerate 6-64-character pooled passwords or 3-8-word passphrases locally with browser randomness, optional similar-character exclusion, custom characters, separators, and opt-in session history. Essential for anyone creating strong, unique passwords for accounts, APIs, and secure access.security-identity / GeneratorsTry it