Changelog

A free browser-based diagram editor for architecture diagrams, flowcharts, and system sketches. Hand-drawn style, infinite canvas, no sign-up required.

Preview HTML email snippets in a sandboxed frame and get a compatibility report flagging elements known to break in common email clients.

Check Dockerfiles for reproducibility, security, and maintainability issues such as missing version tags, root execution, and large layer anti-patterns.

Added a live clock mode that auto-updates the current Unix timestamp every second. You can now also convert directly from ISO 8601 strings.

Lint Kubernetes manifest YAML for missing required fields, container spec issues, absent resource limits, and common best-practice violations.

Paste a raw stack trace and get a formatted table of frames with function names, file paths, line numbers, and column offsets.

Format JSON-Lines logs and clean common plain-text server log formats for easier reading and sharing with teammates.

Compare two .env files and instantly see which keys are missing, which have changed values, and which are new between environments.

Break SQL queries into clearly labelled clauses so joins, filters, grouping, and ordering are easy to inspect and explain to others.

Visual Content Security Policy header generator. Toggle directives and sources through a checklist interface and copy the finished header value.

Paste any PEM certificate and decode its fields: subject, issuer, validity dates, subject alternative names, and key usage extensions.

Upload or paste a HAR export from any browser and get a summary of requests, status codes, slowest resources, and error entries.

Paste OpenAPI JSON or YAML and browse the API title, version, all paths, HTTP methods, and operation summaries in a clean tree view.

Added an entropy display in bits so you can see exactly how strong each generated password is. The exclude ambiguous characters option is now on by default.

Side-by-side comparison of major LLM models covering context window size, pricing per million tokens, output strengths, and knowledge cutoff dates.

Build structured LLM prompts with system, user, and assistant sections. Copy the result as plain text or as a JSON messages array ready to paste into an API call.

Translate SQL WHERE clauses into MongoDB filter syntax. Supports equality, inequality, IN lists, LIKE patterns, AND or OR logic, and NULL checks.

The eyedropper now works in all Chromium-based browsers via the EyeDropper API. Added a history panel that stores your last 16 picked colors.

Resolved an issue where bracket notation paths with numeric keys returned empty results instead of the correct array element.

Validate GitHub Actions workflow YAML client-side. The tool checks required keys, step definitions, trigger formats, and flags common mistakes without sending your secrets anywhere.

Generate ready-to-use Makefiles for Node.js, Python, Go, Rust, and Docker projects. Pick the targets you need, set variables, and download the file.

Calculate and visualize CSS selector specificity with a breakdown by IDs, classes, and elements. Supports multi-selector comparison and sorting.

Generate a harmonious CSS type scale from a base font size and ratio. Output as CSS custom properties or a Tailwind config snippet.

Three calculators in one: find X% of Y, determine what percentage X is of Y, and calculate the percentage change from X to Y.

Generate SQL INSERT statements from a JSON array. Choose between MySQL, PostgreSQL, SQLite, and SQL Server output formats.

Large objects now diff up to 10x faster thanks to a smarter structural comparison algorithm. Added a toggle to ignore key order.

Added OKLCH and OKLAB output formats. All values are now selectable individually so you can copy just the channel you need.

Match count is now shown inline next to the flag toggles. The test input textarea also remembers its last value between sessions.

Fixed an edge case where generating a QR code with certain Unicode characters caused a blank output. All Unicode input is now correctly encoded.

Build Microsoft Adaptive Cards with a live JSON editor and rendered preview. Export the card payload ready to drop into a Bot Framework or Teams app.

Visually construct FetchXML queries for Microsoft Dataverse and Dynamics 365. Select entities, add filters, link entities, and copy the finished XML.

Paste a .env file and instantly get a table of all variables, their values, and whether they look like secrets. Export as JSON or a shell export block.

Enter any two dimensions and get the exact aspect ratio as a fraction and decimal, plus common equivalent sizes at that ratio.

Added radial and conic gradient modes. The color stop editor now supports dragging stops directly on the gradient preview bar.

Generate realistic fake datasets with names, emails, addresses, phone numbers, dates, and custom fields. Export as JSON, CSV, or SQL INSERT statements.

Paste a JSON sample and automatically derive a JSON Schema draft-07 definition. Tweak required fields and add descriptions before copying the result.

Paste minified or malformed XML and get a consistently indented, readable version back. Syntax errors are highlighted with line-specific messages.

Format SQL queries with keyword uppercasing, consistent indentation, and clause line breaks. Supports MySQL, PostgreSQL, and standard SQL dialects.

Claims are now rendered as a formatted table with type labels. The expiry claim shows a human-readable relative time such as 'expires in 2 hours'.

Generate Ed25519 or RSA SSH key pairs entirely in your browser. Download the private key and copy the public key for immediate use.

Generate RSA key pairs at 1024, 2048, or 4096 bits and export in PEM or PKCS8 format. Everything runs client-side with the Web Crypto API.

Enter a base32 secret and get a live 6-digit TOTP code with a countdown to the next rotation. Works with Google Authenticator compatible seeds.

Hash passwords with bcrypt at configurable cost factors and verify an input against any bcrypt hash. All computation stays in the browser.

Validation now supports draft-07 and draft-2020-12 schemas. Errors include a JSON Pointer path so you can locate the failing field immediately.

Generate a production-ready nginx server block with HTTPS redirect, gzip, security headers, and proxy pass options through a guided form.

Build Apache .htaccess rules for redirects, HTTPS enforcement, caching headers, and directory protection through a checklist interface.

Paste a docker-compose.yml and check for schema issues, missing service fields, undefined volumes, and port conflict risks.

Design glass-effect UI cards with live backdrop blur, opacity, border, and shadow controls. Copy the finished CSS with one click.

Build CSS keyframe animations visually with preset easing curves, timing controls, and a live preview. Export the animation block ready to paste.

Convert HTML documents or snippets to clean Markdown. Preserves headings, lists, links, inline code, and tables. Strips scripts and style blocks.

Paste any JSON value and get a TypeScript interface tree with correct optional fields and nested type definitions.

Convert a JSON sample into Go struct definitions with proper field tags. Handles nested objects, arrays, and mixed-type arrays.

Write Markdown on the left and see the rendered HTML preview on the right in real time. Supports GitHub Flavored Markdown including tables and task lists.

Added URL-safe Base64 output mode and a file upload path so you can encode binary files without pasting raw bytes.

Enter any URL and preview how its Open Graph image, title, and description will appear on Twitter, LinkedIn, and Facebook share cards.

Convert Apple HEIC photos to JPG directly in the browser. No upload, no server, no quality loss from re-compression on an external service.

Combine one or more images into a single PDF document. Reorder pages by dragging, choose orientation, and download the result instantly.

Extract every page of a PDF as a PNG or JPG image at your chosen resolution. Useful for thumbnails, previews, and slide exports.

Drag and drop multiple PDF files, reorder them, and merge into a single document. All processing happens in the browser.

Experiment with all flexbox properties on a live preview container. Add child items, adjust them individually, and export the resulting CSS.

Design CSS Grid layouts visually. Set column and row templates, gap values, and place items in named areas. Copy the generated CSS.

Control all four corners independently with sliders and see the shape update live. Generates both shorthand and longhand border-radius CSS.

Create polygon, circle, and ellipse clip paths by dragging points on a live preview. Copy the clip-path CSS value when done.

Build layered box shadows with controls for offset, blur, spread, color, and inset mode. Stack multiple shadows and copy the combined CSS.

Reduce SVG file size by removing comments, metadata, and redundant attributes. Shows before and after file size with a percentage savings.

Convert images between PNG, JPG, WebP, and BMP formats in the browser. Set JPEG quality and download the converted file immediately.

Upload an image or paste an SVG and generate a complete favicon set including ICO, PNG at standard sizes, and an Apple touch icon.

Live HTML, CSS, and JavaScript editor with an embedded preview pane. A lightweight alternative to CodePen for quick experiments.

Added HWB and LCH color space output alongside the existing HEX, RGB, and HSL formats. The color swatch history now persists across sessions.

Count words, characters, sentences, and paragraphs in any text. Shows reading time and speaking time estimates alongside the counts.

Convert text between camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, Title Case, and sentence case in one click.

Compare two blocks of text line by line and see additions, removals, and unchanged lines highlighted with colour coding.

Test regular expressions against sample text with live match highlighting. Supports global, case-insensitive, multiline, and dotAll flags.

Paste a list of lines and remove duplicate entries with options to trim whitespace, ignore case, and sort the output.

Convert Unix timestamps to human-readable dates and back. Shows the result in UTC and your local time zone simultaneously.

Calculate the exact difference between two dates in years, months, weeks, days, hours, minutes, and seconds.

Pick a date and time, choose a source time zone, and see the equivalent time in any target time zone with offset details.

Build cron expressions with a visual field editor. See a human-readable summary and the next five scheduled run times as you type.

Format dates as ISO 8601 strings with configurable precision from date-only to milliseconds. Supports local and UTC output.

Decode any JSON Web Token and inspect the header, payload, and signature sections. Expiry and issued-at claims are displayed as readable dates.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text or file. All hashing runs locally with the Web Crypto API.

Analyse a password for entropy, character variety, and common pattern weaknesses. Get concrete tips on how to strengthen it.

Generate cryptographically secure random tokens in hex, base64, or URL-safe base64 at any byte length from 8 to 512.

Security tools launch: hash and verify passwords with bcrypt at cost factors from 10 to 14, all processed in the browser.

Added a copy button that stays visible even on long documents, improved error highlighting so the offending line is shown in the gutter, and raised the input size limit to 5 MB.

Percent-encode strings for safe use in URLs and query parameters. Toggle between encoding the full string or only special characters.

Decode percent-encoded URL strings back to plain text. Handles both standard and plus-sign encoded spaces.

Escape HTML special characters to their entity equivalents and decode entities back to plain text. Useful for embedding code in markup.

Convert text to Unicode code points, escape sequences, HTML entities, and UTF-8 byte representations. Inspect any character in detail.

DevHexLab launches with its first tool: a fast, client-side JSON formatter and validator with syntax highlighting, collapsible nodes, and error reporting.

Validate JSON syntax instantly with clear error messages that include line and column numbers. No data leaves your browser.

Encode any text or binary input to Base64. Supports standard and URL-safe alphabets with optional line-wrap output.

Decode Base64 strings back to plain text or download as a binary file. Handles padded and unpadded input.

Generate RFC 4122 UUID v4 values in bulk. Copy one or many at a time, with options for uppercase output and hyphen removal.

Generate strong random passwords with configurable length, character sets, and exclusion rules. The initial launch of the DevHexLab platform.