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List files/sizes inside an APK.

Show the IP address our server sees you connecting from.

Look up domain registration info.

Generate a scannable QR code.

Generate strong random passwords.

Monitor SSL certificate expiry dates.

Classic placeholder text for mockups.

Test a pattern against text with live match highlighting and capture groups.

Plain-text line diff with added/removed highlighting.

Live character, word, line, and sentence counts.

Spin up a public mock endpoint that returns configured responses.

Burst-test an endpoint to find its effective rate limit.

Compare two API responses and see a structured diff.

Build and send HTTP requests, inspect responses, save history.

Convert curl commands to fetch/Python/PHP/HTTPie and back.

Run queries against any GraphQL endpoint and browse its schema.

Fetch a URL and explain its response headers, with a security-header grade.

Decode and inspect JWT header/payload, verify signatures.

Walk through an OAuth2 Authorization Code flow and inspect tokens.

Validate a chat completions request or function/tool schema shape.

Fill in {{variable}} prompt templates and preview the resolved prompt.

Design REST endpoint specs and generate docs/mocks from them.

Estimate LLM prompt token count.

Continuously monitor an endpoint for uptime/latency via cron.

Get a unique inbox URL and inspect incoming webhook requests live.

Check which web platform features your browser supports.

Show your screen/viewport size live.

Preview a URL at common device viewport sizes.

Build a Terraform variables file.

Parse or build an AWS ARN.

Look up AWS/GCP/Azure region codes.

Build and explain cron expressions.

Generate a docker-compose.yml.

Generate a Dockerfile for common stacks.

Convert between plain JSON and DynamoDB AttributeValue JSON.

Manage and diff .env files.

Build an AWS IAM policy JSON document.

Generate Kubernetes manifests.

Sample event payloads for S3/API Gateway/SNS/SQS/EventBridge.

Generate nginx server blocks.

Parse/build S3 URLs (virtual-hosted, path-style, s3://).

Re-indent Terraform configuration.

Monitor site/service uptime.

Parse a User-Agent string.

Carve a VPC CIDR into equal subnets.

Pick a color, see it in HEX/RGB/HSL.

WCAG text/background contrast ratio, AA/AAA pass-fail.

Convert between hex codes and RGB values.

Browse Google's Material Design color palette.

Generate random hex colors (pastel/vibrant/dark).

Convert between RGB and HSL.

Browse Tailwind CSS's default color palette.

Convert CSV rows into INSERT statements.

Visualize table relationships.

Generate an ER diagram from a schema.

Pretty-print a MongoDB query/document.

Build MongoDB queries visually.

Visualize an EXPLAIN plan.

Beautify messy SQL into a readable style.

Diff two schema/query snapshots.

Format and beautify SQL queries.

Analyze a query for potential performance issues.

Parse INSERT statements into a JSON array.

Convert text to/from decimal character codes.

Convert text to/from 8-bit binary bytes.

Convert text to/from hex bytes.

Convert text to/from Unicode code points (U+XXXX).

Generate Luhn-valid dummy card numbers for sandbox testing.

Generate fake street addresses for testing.

Generate fake phone numbers (US 555 exchange, etc).

Generate fake names/emails/usernames for testing.

Generate test email addresses on RFC 2606 reserved domains.

Generate harmonious color palettes.

Design CSS @keyframes animations.

Re-indent or minify CSS.

Design and export CSS gradients.

Generate all standard favicon sizes.

Generate glassmorphism CSS.

Diff two HTML snapshots.

Encode or decode HTML entities.

Format and minify HTML markup.

Visually build an HTML table.

Convert between Markdown and HTML.

Generate head meta/Open Graph/Twitter Card tags.

Generate neumorphism CSS.

Design layered CSS box-shadows.

Minify and clean up SVG markup.

Visually build Tailwind class combos.

Build a .gitignore from checklists by language, editor, and OS.

Find stale/merged branches to clean up.

Generate a changelog from commit history.

Searchable reference of common git commands.

Generate a conventional-commit message.

Visualize and help resolve merge conflicts.

Generate release notes from merged PRs.

Convert an image to a base64 data URI and back.

Shrink an image via adjustable JPEG/WebP quality.

Drag-select and crop an image.

Resize an image to exact dimensions.

Convert an image between formats.

Preview SVG markup safely (rendered as an image, not injected).

Convert between CSV and JSON.

Re-indent Firestore security rules.

Diff two JSON documents.

Validate, pretty-print, and minify JSON.

Test JSONPath expressions against sample JSON.

Build a JSON Schema visually from sample data.

Validate and preview TOML as JSON.

Pretty-print and validate XML.

Convert XML documents to JSON.

Validate and format YAML documents.

Parse and summarize crash reports.

Annotate screenshots to report bugs.

Summarize error rates/patterns in logs.

Search and tail uploaded log files.

Pretty-print raw stack traces.

List files/sizes inside an APK.

Generate all required app icon sizes.

Generate a mobile app privacy policy.

Generate app store release notes.

Analyze keyword competitiveness.

Generate App Store/Play Store metadata.

Find high-value ASO keywords.

Build a .entitlements file (associated domains, app groups, push, iCloud, etc).

Validate a google-services.json against the expected Firebase config shape.

Build an iOS/macOS Info.plist from common bundle/privacy keys.

Manage translation strings across locales.

Build sample APNs and FCM push payloads.

Binary arithmetic plus a base converter.

AND/OR/XOR/NOT/shift with a bit-level view.

Subnet math — network/broadcast address, netmask, host range.

Hex arithmetic/bitwise ops plus a base converter.

Show the IP address our server sees you connecting from.

Convert bps/Mbps/etc. and estimate download time.

Convert data sizes between bytes/KB/MB/GB/TB, decimal or binary.

Look up domain registration info.

Generate an EAN-13 barcode.

Generate a scannable QR code.

Encode or decode Base64 text and files.

Test CORS behavior of an endpoint.

Encrypt/decrypt text with common ciphers.

Generate MD5/SHA family hashes.

Generate strong random passwords.

Generate passwords, API keys, AES keys, UUIDs, and RSA/SSH key pairs — all client-side.

Monitor SSL certificate expiry dates.

Generate secure random tokens/API keys.

Generate v4/v7 UUIDs in bulk.

Build a canonical link tag.

Build hreflang alternate-language link tags.

Build a robots.txt from rule groups.

Build JSON-LD structured data for common types.

Build a sitemap.xml from a pasted URL list.

Convert between UPPER/lower/Title/camelCase/snake_case/etc.

Remove repeated lines, keep the first occurrence.

Find/replace text with regex and whole-word options.

Classic placeholder text for mockups.

Random common-English filler text.

Test a pattern against text with live match highlighting and capture groups.

Strip empty/whitespace-only lines.

Randomize the order of lines.

Convert text into a URL-safe slug.

Sort lines alphabetically, A-Z or Z-A.

Plain-text line diff with added/removed highlighting.

Live character, word, line, and sentence counts.

Build an Apple App Store link from an app ID.

Build a custom URI scheme deep link.

Build a mailto: link with subject/body/cc/bcc.

Build a Google Play Store link from a package name.

Build a cross-platform sms: link with a pre-filled message.

Convert between Unix timestamps and dates.

Follow redirects to the final destination.

Create short redirect links.

Build a wa.me click-to-chat link.