Format & Validate 6 tools
JSON, XML, YAML, SQL, HTML, CSS — format, validate, minify.
Developer tools, served warm.
Client-side tools for formatting, encoding, networking, and more. No servers, no tracking, no API keys required. Everything runs in your browser.
Live tools
37 tools ready to use right now. Every category fully populated.
JSON Formatter
Format, minify, and validate JSON with precise error reporting.
Use tool →XML Formatter
Pretty-print and validate well-formed XML.
Use tool →YAML Formatter
Format and validate YAML. Catches boolean coercion, tab indentation, and other common pitfalls.
Use tool →SQL Formatter
Format SQL across 12 dialects — MySQL, PostgreSQL, BigQuery, Snowflake, and more.
Use tool →HTML Beautifier
Beautify, minify, and validate HTML. Preserves <pre> whitespace; configurable wrap length.
Use tool →CSS Beautifier
Beautify, minify, and validate CSS. Sort properties, normalize hex colors, configure indent.
Use tool →Base64
Encode and decode Base64 with Unicode and URL-safe variants.
Use tool →URL Encoder
Percent-encode and decode strings for URLs (component or full URL).
Use tool →HTML Entities
Encode and decode HTML entities with named or numeric output.
Use tool →JWT Decoder
Decode JWT header and payload. Highlights expiration; no verification.
Use tool →Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes of text or files.
Use tool →JSON ↔ YAML
Convert between JSON and YAML with Unicode support and clear error reporting.
Use tool →JSON ↔ CSV
Convert arrays of objects to CSV and back. Handles nested paths and inconsistent keys.
Use tool →Text Case Converter
Convert text to camelCase, snake_case, kebab-case, and 10+ other forms.
Use tool →Color Converter
Convert between hex, RGB, HSL, HSV, CMYK, HWB. WCAG contrast and palettes.
Use tool →Timestamp Converter
Live Unix / ISO 8601 / RFC 2822 clocks and timezone-aware conversion.
Use tool →Subnet Calculator
IPv4 subnet math with private/public classification and VLSM.
Use tool →IPv6 Subnet Calculator
IPv6 network math with compact/expanded notation, network type classification, and reverse DNS zones.
Use tool →CIDR to IP Range
Convert between CIDR and IP ranges for IPv4 and IPv6. Aggregate ranges into minimal CIDR blocks.
Use tool →MAC Address Info
Vendor lookup, format conversion, unicast/multicast detection, and EUI-64 IPv6 derivation.
Use tool →UUID Generator
Generate UUID v4 and v7 (sortable). Bulk and format options; validator included.
Use tool →Lorem Ipsum
Placeholder text in classic, hipster, corporate, pirate, and more styles.
Use tool →QR Code
Generate QR codes for URLs, WiFi, vCard, and more. PNG/SVG download.
Use tool →Regex Tester
Live match highlighting, capture groups, and substitution. All browser-side.
Use tool →Cron Builder
Build and validate cron expressions. See plain-English description and next runs.
Use tool →Oracle SQL Formatter
Format SQL and PL/SQL. Preserves hints, bind variables, and comments.
Use tool →TNS Connection String
Parse tnsnames.ora entries, build new ones, and emit EZCONNECT / JDBC URLs.
Use tool →Oracle to PostgreSQL DDL
Convert CREATE TABLE, sequences, and common DDL from Oracle to PostgreSQL.
Use tool →SQL*Plus Output Cleanup
Strip SQL*Plus banners and turn tabular output into CSV, Markdown, or JSON.
Use tool →Docker Compose Validator
Validate Compose files. Catches typos, missing images, security risks.
Use tool →Kubernetes YAML Linter
Lint Deployments, Services, and ConfigMaps. Flags deprecated APIs and risky defaults.
Use tool →systemd Unit Builder
Build .service and .timer units. Hardening flags built in.
Use tool →Nginx Config Snippets
Generate reverse proxy, static, WebSocket, and HTTPS server blocks.
Use tool →Meta Tag Generator
Generate HTML head tags with Open Graph and Twitter Card preview.
Use tool →Schema.org JSON-LD
Build Article, FAQPage, Recipe, BreadcrumbList, and Organization schema.
Use tool →Sitemap XML Generator
Produce valid sitemap.xml with lastmod, changefreq, and priority.
Use tool →robots.txt Tester
Test allow/block decisions and build robots.txt with AI crawler preset.
Use tool →Client-side only
Every tool runs entirely in your browser. Your data never leaves your device. No logs, no analytics on tool inputs, no server to compromise.
Fast and focused
Each tool does one thing well. Load the page, use the tool, done. No accounts required, no paywall, no email capture.
Actually useful
Built by a developer who uses these tools every day. If a tool exists here, it’s because it solves a real problem — not because it fills a category slot.
Categories
Encode & Decode 5 tools
Base64, URL, HTML entities, JWT, hashes.
Convert 5 tools
Between data formats, text cases, colors, timestamps.
Network 4 tools
Subnet calculators, CIDR math, IP tools.
Generate 5 tools
UUIDs, lorem ipsum, QR codes, regex, cron.
Oracle 4 tools
SQL formatting, TNS strings, migration helpers.
DevOps 4 tools
Docker compose, Kubernetes YAML, systemd, Nginx.
Web/SEO 4 tools
Meta tags, JSON-LD schema, sitemaps, robots.txt.
Frequently asked questions
Is this really free?
Yes. Every tool is free and does not require an account. The site is supported by display advertising in non-intrusive slots outside the tool surfaces.
Do you track what I paste into tools?
No. Every tool runs entirely in your browser — no network request is made with your tool input. We use web analytics for page views only.
Why "codebrûlée"?
Crème brûlée, with code instead of custard. The name is a joke; the tools are serious. The URL drops the accents because domain names are ASCII; the brand keeps them.
Can I use these tools at work?
Yes, including with non-public data. Because everything runs in your browser, pasting internal JSON, IP ranges, or XML payloads does not transmit them. Check your company’s acceptable-use policy, but there is nothing in the tool’s behavior that sends data off your device.
How often do you add new tools?
Regularly. The category list shows every planned tool. Priority goes to tools the site author uses daily — network, SQL, encoding — and to tools with strong search demand.
Is the source code available?
Yes — the site and tool implementations are published. A link is in the footer.
Do you have a tool I need that is not listed?
Email us (contact page). Requests with a clear description of the input, the output, and the use case get prioritized.