UD5 Toolkit
Advanced Set‑Cookie String Parser - Online Decode Flags
Paste a `Set‑Cookie` header and see all attributes parsed: domain, path, Max‑Age, SameSite, Secure, HttpOnly. Debug cookies easily.
Cookie String Parser - Online Decode & Format Browser Cookies
Cookie String Parser
Decode, format, and analyze browser cookie strings instantly. Supports URL decoding and JSON export.
Cookie String
Paste a cookie string and click Parse to see decoded data.
| # | Name | Value (decoded) | Raw Value | Size |
|---|
Frequently Asked Questions
What is a cookie string?
A cookie string is a semicolon-separated list of key-value pairs (e.g., key=value; key2=value2). It's the raw format sent in the HTTP Cookie header. Some characters are URL-encoded to ensure safe transmission.
Why are some cookie values encoded?
Browsers automatically URL-encode special characters (like @, {, }, spaces) in cookie values. Our parser decodes them into readable format using decodeURIComponent().
How accurate is the size calculation?
The Size column shows the byte length of the raw cookie name and value pair (including =), matching the actual bytes sent over the network. This helps identify large cookies that may impact performance.
Can I parse cookies from any website?
Yes! You can copy the cookie string from browser DevTools (Application tab → Cookies → select domain → copy as string) or from the document.cookie JavaScript API. Paste it here for instant analysis.
Pro tip: Use the Copy as JSON button to export the parsed data for debugging or logging. The table copy output is tab-separated for spreadsheets.
Common cookie limitations: Browsers typically allow up to 50-180 cookies per domain, each up to 4096 bytes. Use this parser to audit cookie sizes and stay within limits.
Cookie Store API Tester - Online Async Cookie Read/Write
Read, write, and delete cookies using the modern Cookie Store API. Monitor change events. No more document.cookie parsing.
Redirect Path Tracer - Online SEO Redirect Chain Analyzer
Enter a URL and trace the full redirect chain, seeing each hop's status code and location. Identify unnecessary redirects. Client-side fetch.
Breadcrumb Structured Data Generator - Online JSON‑LD
Create a breadcrumb schema for your website. Fill in the pages and get the ready‑to‑paste JSON‑LD snippet for rich results.
Local Password Vault - Online Encrypted Browser Storage
Store passwords and notes encrypted with a master passphrase. Data lives only in your browser's localStorage. No cloud.
Local JSON Data Explorer - Online Browser Storage Viewer
View, edit, and manage JSON objects saved in your browser's localStorage. Delete, export, or import keys. No setup.
URL Redirect Chain Tracer - Online Check Hops
Enter a URL and follow every redirect until the final destination. Shows each hop's status code, location, and duration.
Timestamp to Relative Time - Online '5 minutes ago'
Convert a Unix timestamp or ISO date into a human‑friendly relative string like '2 days ago'. See examples.
Encrypted Note Taker - Online Write & Encrypt in Browser
Write notes that are encrypted in your browser before saving to localStorage. Only accessible with your passphrase.
CSV to SQL INSERT Converter - Online Generate Statements
Convert comma‑separated data into a series of SQL INSERT statements. Define the table name and column order. Local.
Candle Wick Testing Log – Online Record & Compare Burn Results
Log pool depth, flame height, and soot for each wick series. Quickly identify the best wick for your wax and vessel.
Browser Color Gamut Test - Online P3 or sRGB?
Check if your browser and display support the wider DCI‑P3 color space. See the difference with a simple test pattern.
Keyboard Shortcut Recorder - Online Capture Combinations
Press any key combination and record the sequence. Export as JSON or human‑readable text. Perfect for documenting shortcuts.
Browser Font Stacks Explorer - Online Defaults Per OS
See which fonts map to generic families (serif, sans‑serif, monospace) on different operating systems. A handy reference.
Resistor Color Code Calculator - Online Band to Value
Select color bands to decode a resistor's value, tolerance, and temperature coefficient. Essential for anyone working with electronics hardware.
Markdown to Word Snippet – Online Copy Formatted Text
Render Markdown and copy the formatted output as rich text to paste directly into Word or Google Docs.
JSON to SQL INSERT/UPDATE Converter - Online
Parse a JSON array and generate SQL INSERT or UPDATE statements. Perfect for data migration. Client‑side only.
Fraction Calculator - Online Add Subtract Multiply Divide
Perform arithmetic on fractions and get simplified results. Handles mixed numbers and improper fractions. Step-by-step display. Educational and precise.
Carboy & Keg Tare Weight Library – Online Log & Convert
Record the empty weight of your carboys and kegs. Then weigh a full one to instantly get the liquid weight and volume. Eliminate guesswork.
Stamp Collection Catalog - Online Philately Inventory
Record your stamps with Scott number, condition, and value. Add images. Browse your collection. Local storage only.
Daily Calorie Intake Estimator - Online BMR & Activity
Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure. Set goals for weight loss, maintenance, or gain.
Playdough Recipe Calculator – Online Adjust Batch Size
Scale a classic homemade playdough recipe to any amount. Choose colors with safe options. Simple local calculator.
Composite Deck Gap Calculator – Online Temperature‑Dependent Spacing
Input the installation temperature and board length to find the correct end‑to‑end gap for composite decking. Prevent buckling.
Clipboard API Tester - Online Read & Write Sandbox
Experiment with the Async Clipboard API: read/write text and images from the clipboard. Verify permissions and see demo code.
Simple Hash Generator - Online DJB2 & CRC32
Hash any text using simple, fast algorithms: DJB2, SDBM, or CRC32. Get integer or hex. For quick lookups. Local.
CMYK to Pantone Converter - Online Approximate Match
Enter CMYK values and find the closest Pantone Solid Coated color. For print design reference. Client‑side lookup.
Cavy Vitamin C Intake Tracker – Online Fresh Food mg Estimator
Log daily veggies and see total vitamin C mg provided. Ensure your guinea pig avoids scurvy.
Express Route Snippet Generator - Online Node.js API
Enter a resource name and HTTP method to get a complete Express route handler with try/catch and comments.
Batch Cooking Scaler – Online Freeze Meal Portions
Scale a recipe to serve a crowd and calculate container sizes needed. Meal prep helper.
Smoothie Recipe by Color - Online Get Green or Pink
Want a green smoothie? Pick a color and get a simple healthy recipe. Detox, protein, or fruit.