All tools, by use case

See live local times for major cities and regions side by side—useful when debugging regional outages or scheduling deploys across teams.

Convert Unix seconds or milliseconds to human-readable dates and back. Ideal for JWT exp claims, log lines, and API timestamps.

Format, minify, validate, and tree-edit JSON. Catch syntax errors before they hit production APIs or mobile clients.

Convert between YAML and JSON, preview structure, and tidy config files for Kubernetes, CI, and app settings.

Write Markdown with a live preview, multiple notes, and local vault storage—handy for docs, runbooks, and README drafts.

Format, validate, and inspect XML documents for SOAP APIs, RSS, sitemaps, and legacy integrations.

View and edit CSV in a table or raw text, reformat delimiters, and spot bad rows before importing into spreadsheets or databases.

Prototype markup with a line-numbered editor and instant preview—useful for email snippets, landing tweaks, and component sandboxes.

Compare two texts line-by-line or word-by-word. Essential for config drift, API JSON changes, and code or log reviews.

Count words, characters, and reading estimates for articles, ads, and LLM prompts with clear, copy-friendly stats.

Switch between camelCase, snake_case, CONSTANT_CASE, and more in one pass for identifiers and env vars.

Encode or decode text and small files to Base64 for data URLs, tokens, and binary-safe transport in JSON.

Pretty-print SQL with dialect-aware formatting for MySQL, PostgreSQL, SQLite, T-SQL, and more—useful before reviews and docs.

Generate placeholder paragraphs for wireframes, CMS previews, and layout tests without hunting for filler copy.

Break down standard five-field cron expressions into plain-language hints for each field when editing crontabs.

Turn titles into hyphenated or underscored URL slugs with sensible stripping of punctuation and accents.

Paste JSON and copy a starter TypeScript type—handy for API fixtures before you add zod or OpenAPI models.

Encode and decode HTML entities for attributes and text nodes when debugging templates or CMS output.

Enter any URL to see if a site responds from our infrastructure, with HTTP status and timing context—not just “works on my machine.”

Measure DNS, TLS, time to first byte, and download phases for a URL to pinpoint slow hops and caching issues.

Compose cURL commands with headers, auth, and bodies, or paste an existing command to edit and share with your team.

Add UTM and tracking parameters consistently so analytics teams can attribute traffic without hand-typing query strings.

Percent-encode or decode strings using encodeURIComponent or encodeURI rules—fix broken links and query values safely.

Search a curated list of HTTP status codes with phrases and short explanations for API and CDN debugging.

Fill title, description, canonical URL, and image to copy HTML meta and social preview tags for new pages.

Draft Allow, Disallow, and Sitemap lines for robots.txt before publishing to your site root or CDN.

Resolve IPv4/IPv6 details and geolocation hints to verify client egress, VPN endpoints, and suspicious traffic sources.

See whether an IP appears on common DNS block lists that affect email deliverability and reputation.

Confirm whether your real IP or DNS is exposed when using a VPN—privacy and compliance teams use this for quick audits.

Inspect mail headers and routing hops to trace spoofing, forwarding, and delivery delays.

Map an IP back to its PTR hostname to validate mail servers and hosting providers.

Resolve A, AAAA, CNAME, and MX records in one place when debugging DNS propagation and cutovers.

Compute MD5, SHA-1, SHA-256, and SHA-512 digests for UTF-8 text or files without uploading secrets to a third party.

Decode, validate, and inspect JSON Web Tokens—inspect alg, exp, and custom claims during API integration and auth debugging.

Convert between HEX, RGB, HSL, and related formats for design handoff and CSS variables.

Create QR codes for URLs, Wi-Fi, vCards, SMS, and more—download-ready for print and signage.

Generate RFC-compliant UUIDs in bulk for test data, database keys, and correlation IDs.

Create strong random passwords with length and character-set controls you can copy securely.

Generate randomized promo and coupon codes with custom prefixes, lengths, and charset rules for QA and campaigns.

Convert octal Unix permissions to rwx grids and copy chmod commands for scripts and container images.

Minify or beautify stylesheets in the browser with a worker-backed formatter and a safe main-thread fallback.

Convert between B, KB, MB, GB, and TB using either 1024 (IEC) or 1000 (SI) bases for storage math.

Count tokens for popular models, compare pricing tiers, and size prompts before you burn budget in production.

Approximate GPU VRAM needs for inference and fine-tuning given model size, precision, and batch assumptions.

Visualize tokens per second and latency so stakeholders understand streaming UX before picking a model tier.