About DevWorkBench
Privacy-first developer utilities
DevWorkBench is a small, deliberately boring collection of developer utilities — the kind of thing you reach for five times a day and forget about the moment they work. What makes them different is how they work: everything runs in your browser, so sensitive JSON, configs and content never cross the network.
Privacy by default
Every tool executes locally. We have no servers to store your JSON, your hashes or your secrets — which means there is nothing for us — or anyone else — to steal.
Free, no strings
No accounts, no signups, no email walls, no metered limits on the core tools. If you are a developer, you already have a job; this site is not trying to become your inbox.
Fast and focused
One job per tool, near-zero-jank interfaces, keyboard-friendly where it helps, and results that appear the instant you type.
Roadmap
More tools are on the way across text, encoding, formatting and networking — including JSONPath testing, XML/HTML utilities and an API-client style formatter. The site is, and always will be, free — no paid tier, no account, no limits beyond what keeps a tab responsive.
The site is a small, focused project built by a solo maintainer. Feature requests and bug reports are welcome via the contact page.
What's in the toolkit
- JSON Formatter & ValidatorBeautify, minify, validate and explore JSON with a tree view.
- Base64 Encoder / DecoderEncode and decode Base64 text with full UTF-8 support.
- Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes instantly.
- Text Diff CheckerCompare two texts side by side with live highlighting.
- Regex TesterLive pattern matching with highlighted matches and groups.
- UUID GeneratorBulk generate RFC 4122 UUIDs (v4 & v7) in one click.
- URL Encoder / DecoderEncode and decode URLs and query parameters cleanly.
- CSV ⇄ JSONConvert CSV tables to JSON and back, with live preview.
- JWT DecoderDecode JWTs into header, payload and signature views.
- Timestamp ConverterConvert Unix timestamps, ISO dates and human dates both ways.
- Hex ViewerInspect text bytes as an offset, hex, ASCII classic hexdump.
- Case ConverterConvert text between camelCase, snake_case, kebab-case and more.
- URL Slug GeneratorTurn any title or phrase into a clean, SEO-friendly URL slug.
- Lorem Ipsum GeneratorGenerate placeholder text: words, sentences or paragraphs.
- Password GeneratorGenerate strong random passwords with an entropy estimate.
- Text StatisticsCount words, characters, lines, sentences and reading time.
- HTML Entities Encoder / DecoderEncode or decode HTML entities (&, <, &) safely.
- Color Converter & Contrast CheckerConvert HEX, RGB, HSL and HSV with WCAG contrast ratios.
- CSS Unit ConverterConvert px ⇄ rem ⇄ em with a configurable root font size.
- HTML FormatterBeautify messy HTML with clear indentation and tags.
- CSS MinifierMinify CSS: strip comments, whitespace and shorten colors.
- YAML ⇄ JSONConvert between YAML and JSON with strict validation.
- SQL FormatterBeautify SQL with configurable indentation and keywords.
- CSV → SQL GeneratorTurn CSV data into CREATE TABLE and INSERT statements.
- HMAC GeneratorCompute HMAC-MD5, HMAC-SHA1, HMAC-SHA256, HMAC-SHA512.
- Cron Expression ParserExplain cron schedules like '*/5 * * * *' in plain English.
- IPv4 Subnet CalculatorCalculate networks, broadcast addresses and host counts for CIDR.
- JSON Diff CheckerCompare two JSON documents and see exactly what changed.
- CSV Diff CheckerCompare two CSV files and highlight added, removed and changed rows.
- Markdown PreviewerLive Markdown to HTML preview, side by side as you type.
- SVG OptimizerStrip comments, metadata and editor cruft from SVG markup.
- Image to Base64 ConverterConvert any image to a Base64 data URI, ready to embed.
- Image CompressorShrink images to JPEG, WebP or PNG with a live size comparison.
- JSON to TypeScriptGenerate TypeScript interfaces straight from a JSON sample.
- QR Code GeneratorTurn any text or URL into a downloadable QR code.
- JWT VerifierVerify a JWT signature against a secret or public key.
- JSON Schema ValidatorValidate JSON against a JSON Schema and see every violation.
- JSON VisualizerExplore JSON as an interactive, collapsible node graph.
- Open Graph PreviewPreview how a link will look shared on social media.
- Favicon GeneratorGenerate every favicon size from one image, with the HTML snippet.