Email Header Parser - Online Analyze Email Delivery Path
Paste raw email headers and get a human-readable breakdown of the delivery route, authentication results, and delays. Private analysis.
UD5 Toolkit
Validate JSON-LD, Microdata & preview Rich Results in real time.
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Paste raw email headers and get a human-readable breakdown of the delivery route, authentication results, and delays. Private analysis.
Paste two versions of the same idea and see a wordâlevel diff highlighting the rewrite. Not AI, just diff.
Add, remove, push, pop items and watch the data structure change visually. Supports arrays, stacks, and queues. For CS students.
Paste raw email headers and see authentication results (SPF, DKIM, DMARC) in a readable table. Find spoofing attempts.
Build a date format string for SQL by toggling components (YYYY, MM, DD). See a live example for different databases.
Search for any file extension to see its full name, MIME type, and description. Covers thousands of entries. Static data.
Enter a URL and see a waterfall of external scripts with their download size and execution time estimate. Identify performance culprits.
Create categorized shopping lists (produce, dairy, meat, etc.). Add items, check them off, and print. Data stored in your browser. Never lose a list.
Format your SQL code with consistent indentation. Choose 2 or 4 spaces. No syntax validation, just neat output.
Check and beautify your TOML config files. Highlights errors and aligns tables and arrays. Safe local parsing.
Browse, edit, and delete keys stored by the idbâkeyval library in your browser. Handy for debugging PWAs.
Check if an IBAN has the correct length and structure for its country. Early validation, no bank connection.
Enter a URL and a userâagent to see if it is allowed or blocked by the robots.txt file. Quick bot validation.
Paste HTML and extract all unique dataâ* attributes into a clean list. Understand the data model of a page.
Check English spelling and get suggestions using the browser's built-in dictionary. Highlight errors instantly. No data leaves your machine.
Experiment with JavaScript Intl.DateTimeFormat options. Choose locale, dateStyle, timeStyle, hour12 and see live output. Copy the code snippet for your project.
See how a full paragraph looks with your chosen text and background colors. Not just a ratio; the real appearance.
Paste CSV data and instantly get a formatted MediaWiki table code. Ideal for Wikipedia editors and internal wikis.
Inspect any website's SSL/TLS certificate details: issuer, expiry date, subject, and SANs. Verify certificate chains. All checks are private and require no server upload.
Query DNS records for any domain directly from your browser using DNS-over-HTTPS. See A, AAAA, MX, CNAME, and TXT records. No logs.
Multiple digital counters for tracking stitches, rows, and pattern repeats. Increment, reset. Works on mobile.
Type a child's name and create a printable dotted trace sheet. Practice fine motor skills. Local only.
Set up firstâline indentation and hanging punctuation. See how they affect reading flow. Copy the CSS.
Create a DMARC policy record with percentage, reporting addresses, and alignment mode. Validate and copy the final DNS TXT.
Paste text and quickly highlight potential proper nouns (capitalized sequences). Aid for editing or anonymization. Simple regex-based, local.
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside fetch.
Paste plain text and turn it into a nested outline using indent levels or Markdown headings. Great for planning.
Interpret your blood pressure reading based on American Heart Association and European Society of Cardiology categories. Visual gauge with actionable health insights.
Practice positive/negative lookahead and lookbehind. See matches highlighted live. Master advanced regex.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.