DevPane

Certificate Decoder launched — Paste a PEM certificate, CSR, or full chain: decoded fields, expiry countdowns, chain visualization with incomplete-chain detection, and private-key matching — all in your browser.

Email Header Analyzer launched — Paste raw email headers to trace every delivery hop with per-hop delays, read SPF/DKIM/DMARC verdicts, and spot spoofing red flags. Headers never leave your browser.

OpenAPI Viewer launched — Paste, upload, or fetch an OpenAPI 3.0/3.1 spec and browse endpoints by tag, inspect schemas, search everything, and validate with fix suggestions — 100% in your browser.

Robots.txt Generator & Tester launched — Build robots.txt visually from presets, test URL paths against your rules with RFC 9309 longest-match semantics, and validate existing files with fix suggestions.

.env File Manager launched — Edit, compare, merge, and validate .env files with masked values and secret detection — plus one-click .env.example generation. Everything stays in your browser.

Mermaid Timeline Diagrams launched — New interactive guide with 7 live-editable timeline examples — product releases, incident responses, sprint retros, and more. Edit the code, see the diagram update instantly.

JSON Spec Compliance Checker launched — Paste JSON and see exactly which RFC 8259 rules it violates — double quotes, trailing commas, comments, unquoted keys — with spec section citations and auto-fix.

JWT Security Analyzer launched — Paste a JWT into the best practices guide and get an instant A-F security grade with a reactive checklist showing which practices your token follows.

User Agent Parser launched — Parse and analyze browser user agent strings. Detect bots, inspect Client Hints API, and explore presets for common browsers, crawlers, and CLI tools.

ASCII / Unicode Table launched — Interactive ASCII and Unicode character reference with search, filtering by category, codepoint lookup, and bulk conversion tools.

IP Address Lookup launched — Look up any IP address: geolocation, reverse DNS, classification (public/private/reserved), format conversion, and WebRTC VPN leak testing.

Mock Data Generator launched — Generate realistic test data with a visual schema builder. 37 field types, bulk generation up to 100K rows, and export to JSON, CSV, SQL, TypeScript, XML, and YAML.

Hex Encoder launched — Convert between text and hex with multiple separator styles. Features xxd-style hex dump, file magic byte detection, hex color parsing, and pattern search.

Timezone Converter launched — Convert times across timezones with a meeting planner. Includes DST guide, UTC offset reference, and timezone best practices for developers.

Byte Calculator launched — Convert between bytes, KB, MB, GB, TB with both SI (1000-based) and IEC (1024-based) units. Includes file size cheat sheet and bandwidth calculator.

Base Converter launched — Convert between binary, octal, decimal, hex, Base32, Base58, Base64 and custom bases. Includes bitwise operations, arithmetic in any base, and reference tables.

ASCII to SVG Converter launched — Turn ASCII art diagrams into beautiful SVG and PNG images. Supports boxes, arrows, diamonds, nested layouts, and themed rendering. Our second Premium tool.

Mermaid Diagram Renderer launched — Our first Premium tool. Write Mermaid code, see live diagrams with zoom and pan. Export as SVG or PNG. Supports flowcharts, sequence diagrams, ER diagrams, and more.

8 New Tools Announced launched — All 8 tools from Phase 11-12 are now live: Base Converter, Byte Calculator, Timezone Converter, Hex Encoder, Mock Data Generator, IP Lookup, ASCII Table, and User Agent Parser.

All 20 Tools Live launched — The original DevPane suite is complete. Password Generator and HTML Entity Encoder are now live.

HTML Entities launched — Encode and decode HTML entities with XSS prevention mode, 251-entity reference table, and Unicode explorer.

Password Generator launched — Generate secure passwords, Diceware passphrases, API keys, and encryption keys with strength analysis.

18 Tools Now Live launched — HTTP Status Codes and Markdown Preview join the suite. Tier 3 complete.

Markdown Preview launched — Live split-pane Markdown editor with GFM support, HTML export, table generator, cheat sheet, and frontmatter editor.

HTTP Status Codes launched — Interactive HTTP status code explorer with decision tree, code snippets for 6 frameworks, and detailed explanations.

SQL Formatter launched — Format, minify, and analyze SQL queries with multi-dialect support for PostgreSQL, MySQL, SQLite, T-SQL, BigQuery, and Redshift.

YAML Validator launched — Validate, format, and convert between YAML, JSON, and TOML with Kubernetes manifest and GitHub Actions workflow detection.

14 Tools Now Live launched — Four new Tier 2 tools join the suite. UUID Generator, Diff Checker, Color Converter, and chmod Calculator are live.

chmod Calculator launched — Calculate Unix file permissions with interactive grid, umask calculator, and common preset library.

Color Converter launched — Convert colors between HEX, RGB, HSL, and OKLCH with WCAG contrast checker and palette generator.

Diff Checker launched — Compare text and code with syntax-aware side-by-side and unified diff views.

UUID Generator launched — Generate, validate, and inspect UUIDs v1, v4, and v7 with bulk generation and collision analysis.

Hash Generator launched — Generate and verify MD5, SHA-1, SHA-256, SHA-512, and other hashes with file hashing support.

URL Encoder launched — Encode, decode, and parse URLs with query string builder and component breakdown.

Regex Tester launched — Test regular expressions with live matching, plain-English explanations, and common pattern library.

Base64 Encoder launched — Encode and decode Base64 with file support, URL-safe mode, and bulk operations.

10 Tools Now Live launched — Four new Tier 1 tools join the original six. Base64, Regex, URL, and Hash are live.

Domain Dashboard launched — DNS records, WHOIS data, SSL certificate analysis, security headers audit, and overall health scoring.

Subnet Calculator launched — CIDR calculator, VPC planner, subnet splitter, overlap detector, and interactive cheat sheet.

Epoch Converter launched — Convert timestamps in 9 languages

Cron Builder launched — Visual cron builder with natural language input, clock face visualization, and frequency analysis

JSON Formatter launched — JSON Formatter, validator, and analyzer with Monaco Editor, tree view, schema inference, and diff mode

JWT Decoder launched — JWT decoder and security inspector with signature verification, token comparison, and code generation