Tools
29 free tools for developers and marketers — extractors, testers, and calculators. Most run entirely in your browser.
Developer Tools (10)
View source on mobile, test API keys, convert URLs to Markdown, and dig IDs out of WordPress and GitHub.
Source Viewer
View a website's HTML source code on mobile devices, including Chrome on Android and iOS. Just paste a URL to view the page source — with line numbers.
Popular
API Key Tester
Check any AI API key in your browser — your key never leaves your machine.
56 providers
Claude Code Paste Cleaner
Turn a messy Claude Code terminal copy into clean text or restored markdown — entirely in your browser.
Find WordPress Category IDs
List every category ID on any WordPress site in one paste, straight from its REST API.
Find WordPress Post ID
Find any WordPress post's numeric ID in one paste — no need to dig through page source by hand.
Find WordPress Tag IDs
List every tag ID on any WordPress site in one paste, straight from its REST API.
Find WordPress User IDs
List every author's user ID on any WordPress site in one paste, straight from its REST API.
GitHub User ID Finder
Get a GitHub user's numeric ID and profile info in one lookup — straight from the GitHub API, no server in between.
LLM Model ID Reference
Copy the exact API model ID string — no digging through docs.
7 providers
URL to Markdown
Turn any web page into clean, copyable Markdown — strip the chrome you don't want, keep the structured data you do.
LinkedIn Tools (4)
Extract post dates, text, URNs, and profile IDs from LinkedIn.
LinkedIn Post Date Extractor
Find the exact date and time any LinkedIn post was published.
Popular
LinkedIn Post Text Extractor
Copy the full text of any LinkedIn post.
Popular
LinkedIn Post URN Extractor
Pull the URN identifier from any LinkedIn post URL.
LinkedIn Profile ID Finder
Find the numeric entity ID behind any LinkedIn profile.
SEO Tools (8)
Stem keywords, analyze sitemaps, build UTM codes, and batch-edit URLs.
Bulk URL Encoder/Decoder
Percent-encode or decode a whole list of URLs at once — paste, pick a direction, done.
Bulk URL Opener
Open a whole list of URLs at once, right from your browser — no extension required.
Bulk URL Parameter Updater
Add or overwrite any query parameter across a whole URL list in one pass — existing query strings are preserved.
Bulk UTM Code Builder
Tag dozens of URLs with consistent UTM parameters in one pass — existing query strings are preserved.
GS:QL Query Writer
Skip hand-writing BigQuery SQL for GSC bulk-export data — paste the report URL you're already looking at and get a query that matches it.
Keyword Stemmer
Cluster and match keywords by their word stem in one paste — no server round-trip.
Unique Word Counter
See word frequency and keyword density at a glance — nothing leaves your browser.
XML Sitemap Analyzer
Get a fast structural read on any XML sitemap — URL counts, path breakdown, and freshness — without downloading and parsing it yourself.
Calculators (3)
Price LLM API usage, estimate Snowflake costs, and work out aspect ratios.
Aspect Ratio Calculator
Get exact pixel dimensions for any aspect ratio, or check an image's ratio by uploading it — nothing leaves your browser.
LLM API Cost Calculator
Compare model costs side-by-side with exact token counts.
7 providers
Snowflake Cost Calculator
Get a realistic Snowflake cost estimate in seconds — no spreadsheet, no sign-up, nothing leaves your browser.
Social Media Tools (4)
Find the exact posting date of TikTok, Instagram, Reddit, and Tumblr posts.
TikTok Video Date Extractor
Find when any TikTok video was posted.
Popular
Instagram Post Date Finder
Find the exact date of any Instagram post.
Reddit Post Date Finder
Get the exact timestamp of any Reddit post.
Tumblr Post Date Finder
Find the exact date and time any Tumblr post was published.