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A small, careful collection of developer utilities — formatters, decoders, encoders. No login, no analytics that follow you, no data leaves your tab. Built and maintained by CODERCOPS.
Format, validate, minify. Syntax-highlighted output with collapsible tree view, plus JSON → CSV / TypeScript / YAML conversion.
Decode any JWT into header, payload, and signature. Human-readable claims, expiry status, and a built-in HS256 encoder.
Text, images, files — encode to Base64 or decode back. URL-safe variant, data URIs, and magic-byte file detection.
Fill in your details, preview live, and download a crisp invoice PDF. Saves invoices in your browser — reusable sender profile, deductions, and auto-numbering.
Percent-encode or decode a URL, a query value, or form data. See every query param broken out, with duplicates kept in order.
Convert Unix timestamps and dates with automatic unit detection, UTC, local time, ISO 8601, and relative time.
Convert between HEX, RGB, and HSL formats with alpha support, live swatch preview, and WCAG AA and AAA accessibility contrast checking.
Convert text between camelCase, snake_case, kebab-case, and 7 more naming conventions. Handles acronyms, digits, and multi-line input.
Convert integers between binary, octal, decimal, hex and any base from 2 to 36, with two's complement for 8, 16, 32 and 64 bits.
Generate UUID v4 and v7 identifiers locally, create batches, customize formatting, and inspect versions, variants, and v7 timestamps.
Paste a crontab line and get a plain-English description, a field-by-field breakdown and the next run times in UTC or your local time.
Parse, validate, and pretty-print CSV/TSV. Auto-detect delimiters, convert to JSON, TypeScript, YAML, SQL, and fix common formatting issues.
Test a JavaScript regular expression against sample text with highlighted matches, capture groups, named groups and a replace preview.
Write Markdown and see sanitized, GitHub-flavored HTML rendered live. Copy HTML or download the source without leaving your browser.
CODERCOPS builds production-grade backends, REST APIs, auth systems, and full-stack applications for startups and enterprises.