Use this guide as an operational checklist, then run the linked tools to validate changes immediately.
All Tools
Browse tools organized by use case
Format, validate, and inspect structured data and source code, including JSON, XML, SQL, HTML, and CSS.
Format, validate, and minify JSON payloads instantly.
Format, validate, and minify XML payloads instantly.
Format and beautify SQL queries for various dialects.
Format and beautify JavaScript code with consistent indentation and readable output.
Minify JavaScript code by removing whitespace, comments, and redundant bytes.
Minify HTML by removing comments and unnecessary whitespace.
Format, minify, and clean up your HTML and CSS code perfectly.
Format, minify, and download clean HTML with a focused single-task workspace.
Convert HTML snippets into clean Markdown instantly in your browser.
Minify your CSS by stripping comments, whitespace, and redundant characters.
Query JSON data with JSONPath expressions interactively.
Compare two JSON files and visualize the differences.
Format, split, and convert NDJSON (Newline Delimited JSON).
Compare two CSV files and highlight differences row by row.
Merge multi-document YAML or apply JSON Merge Patch semantics to YAML locally.
Inspect JSON, YAML, and XML as a local tree with relationship edges and shape statistics.
Convert data across formats and encode/decode payloads such as Base64, URLs, HTML entities, and data files.
Encode or decode HTML entities instantly in your browser.
Convert bidirectionally between YAML and JSON seamlessly.
Paste JSON and instantly generate TypeScript interfaces.
Convert between CSV and JSON formats instantly. Supports auto-detection, custom delimiters, and type inference.
Encode text to Base64 format or decode it back to a readable string.
Encode text for safe URL transmission or decode it back to readable string.
Convert images to Base64 data URIs and back.
Gzip/Deflate compression lab with browser-dependent Brotli support for HTTP debugging, size checks, and Base64 transfer.
Inspect text, hex, and Base64 as bytes locally with UTF-8 text, grouped hex, Base64, binary rows, offsets, and byte statistics.
Refine text content with counting, cleanup, casing, diffing, and writing-focused helper utilities.
Live split-pane Markdown editor with GFM support.
Compare two pieces of text side-by-side. Highlights additions, deletions, and modifications instantly.
Remove repeated spaces, tabs, and line breaks in one click.
Count characters, letters, words, and lines instantly.
Transform plain text into bionic-reading style output for faster scanning and focus.
Instantly generate dummy text for your layouts and mockups.
Convert text or images to ASCII art.
Convert text between slug, camelCase, PascalCase, snake_case, and more.
Detect and remove zero-width spaces, control characters, and confusable whitespace from text.
Inspect Unicode code points locally, including UTF-16 units, UTF-8 bytes, invisible characters, combining marks, bidi controls, and non-ASCII text.
Debug web protocols and API flows with JWT, hashing, headers, HTTP, OpenAPI, and request builders.
Paste an OpenAPI/Swagger JSON spec to visualize your API endpoints.
Decode JSON Web Tokens instantly. Never sends your token to any server.
Encode, decode, and verify JWT tokens in one local-first workspace.
Instantly generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Generate an MD5 hash quickly with a focused single-algorithm workflow.
Test and evaluate regular expressions in real-time natively in your browser.
Generate practical regex patterns for common validation and parsing tasks.
Build, parse, and understand cron schedules easily.
Decode raw User-Agent strings to identify browser, engine, OS, CPU, and device details.
Visualize the next execution times for any cron expression.
Searchable reference for all HTTP status codes with descriptions.
Interactive Unix file permission calculator. Toggle permissions or enter octal directly.
Calculate network, broadcast, host ranges, and masks from IPv4 CIDR blocks.
Parse URLs into components and interactively edit query parameters.
Decode PEM-encoded X.509 certificates and inspect all details locally.
Build HTTP requests visually and generate cURL, JavaScript fetch, or Python code.
Convert cURL commands to JavaScript, Python, Go, PHP, or Rust code.
Verify JWT signatures (HMAC) and validate claims — all client-side.
Parse and test robots.txt rules against URLs to check crawler access.
Parse Content Security Policy headers and analyze for security issues.
Compare HTTP headers side by side and highlight differences.
Analyze security headers with pass/warn/fail scoring and remediation guidance.
Paste an OpenAPI spec and generate mock responses for each endpoint.
Convert docker run commands into docker-compose.yml service definitions.
Parse and analyze logs locally. Supports JSON Lines, plain text, and common log formats.
Query and transform JSON using the powerful jq language
Redact secrets, tokens, emails, IP addresses, and credentials from logs locally before sharing.
Query YAML and JSON locally with a practical yq-like path subset for config inspection.
Inspect browser HAR exports locally and redact headers, cookies, query strings, bodies, and response content before sharing.
Chain local developer tools into repeatable browser-only recipes with import, export, sharing, and local saves.
Decode SAML requests and responses locally, inspect assertions, attributes, audiences, recipients, and signature material without validating trust.
Parse DER, PEM, Base64, or hex encoded ASN.1 data locally and inspect TLV structure, tag names, lengths, OIDs, strings, and nested containers.
Generate IDs, passwords, timestamps, secrets, and utility payloads for development and testing workflows.
Convert epoch timestamps instantly to human-readable dates (supports both seconds and milliseconds).
Instantly generate secure, random UUIDs (version 1 or 4) in bulk.
Generate secure, cryptographically random passwords instantly.
Generate CODE128 and EAN-13 barcodes with SVG/PNG export and checksum-safe normalization.
Generate realistic, checksum-valid IBAN samples for QA and testing without exposing real banking data.
Shuffle, deduplicate, and sample list items with optional seeded randomness for reproducible QA runs.
Parse .env files, validate variables, and export to JSON, YAML, or Docker args.
Generate UUID v4, UUID v7, ULID, and NanoID in bulk with configurable options.
Generate time-based or counter-based one-time passwords for 2FA.
Create visual and media assets such as code images, color outputs, SVG assets, and share-ready design snippets.
Optimize SVG files by removing metadata, comments, and redundant attributes.
Find high-contrast, production-friendly font pairings and copy the CSS import snippet instantly.
Render typed text as handwriting-style images with downloadable PNG output.
Convert code snippets into downloadable PNG images.
Instantly convert HEX, RGB, HSL, and CMYK color codes.
Tune iOS shadow props and Android elevation with a live preview and copy-ready StyleSheet output.
Generate brand-ready color palettes from a seed color and style keyword.
Mix two colors in RGB or HSL space with ratio control and CSS output.
Generate 10-12 shade steps from a base color and export token-ready CSS variables.
Upload an image to detect its average color and copy the HEX/RGB result.
Add bold captions to images with position, stroke, and export controls.
Extract dominant palette colors from any image and copy HEX values instantly.
Click any point on an image to sample and copy exact HEX/RGB color values.
Crop images with adjustable bounds and export the exact selected region.
Apply adjustable brightness, contrast, saturation, grayscale, and blur filters to images.
Apply popular Instagram-style filter presets, fine-tune settings, and export high-quality images.
Generate Instagram-style post mockups with profile, caption, engagement stats, and PNG export.
Create Instagram story mockups with text overlays, progress bars, CTA blocks, and PNG export.
Generate Open Graph and Twitter meta tags with live social card preview and copy-ready output.
Generate tweet-style image cards with profile info, engagement stats, themes, and PNG export.
Turn tweet text into shareable PNG cards with theme presets, avatar upload, and flexible canvas ratios.
Estimate ad and click revenue from X/Twitter traffic using CPM, CTR, CPC, fill-rate, and growth assumptions.
Compliance-safe downloader for authorized image URLs with ownership confirmation and clear failure guidance.
Parse Vimeo URLs and extract public thumbnail image links with quality options and direct download.
Parse YouTube URLs and extract public thumbnail image links with quality options and direct download.
Resize images with width/height control, aspect lock, fit modes, and format export options.
Censor sensitive image regions with adjustable pixelate or blur controls.
Enhance scanned pages with contrast and threshold controls, then export all pages as one PDF.
Generate random organic SVG blob shapes with adjustable points, randomness, and seed.
Create tileable SVG patterns with editable spacing, stroke, and color presets.
Convert stroked SVG primitives into fill-based shapes with live preview and export.
Convert SVG markup to high-quality PNG with custom resolution and transparent background support.
Create repeatable CSS background textures with presets, sliders, and copy-ready code.
Visually tune each corner radius and export clean CSS border-radius values.
Build single or multi-layer CSS shadows with live preview and downloadable snippets.
Create custom checkbox styles with hover/checked-ready CSS output.
Generate clip-path polygons with presets, custom points, and live previews.
Visualize and export easing curves for smooth CSS transitions.
Design frosted glass cards with blur, alpha, border glow, and export-ready CSS.
Build linear or radial gradients with adjustable angle, stops, and clean CSS output.
Create spinner, dots, or bars loaders with customizable size, speed, and CSS export.
Generate polished toggle switch styles with size, color, and state controls.
Craft animated glitch text effects with adjustable intensity, colors, and CSS export.
Generate directional CSS triangles for tooltips, pointers, and UI arrows.
Generate QR codes with custom sizes and colors. Download as PNG or SVG.