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What is a SHA-256 hash? A short explainer with examples

What is a SHA256 hash? It is a 64-character fingerprint of some data, made by the SHA-256 algorithm. Feed it the same input and you always get the same fingerprint; change one letter and the fingerprint looks completely different.

JSON to YAML: turn a JSON file into readable config

JSON to YAML conversion takes data written with braces and quotes and rewrites it as indented YAML, which is easier to read and to add comments to. The quickest free way is to paste the JSON into AyeTab's converter, which turns it into YAML inside your browser without sending it anywhere.

Epoch converter: four free ways to turn Unix time into a date

An epoch converter changes a Unix timestamp, the count of seconds since 1 January 1970 UTC, into a readable date and back. Our pick is the free AyeTab Unix Time Converter, because it runs entirely in your browser and shows every format you are likely to need from one paste.

Regex cheat sheet for JavaScript, with patterns you can test right away

This regex cheat sheet for JavaScript covers the tokens you will use most: character classes, quantifiers, anchors, groups and flags, each with a one-line example. Keep it open next to the free AyeTab RegExp Tester, which runs the same JavaScript engine, and try each line as you read it.

Best diff checker in 2026: six tools ranked for real work

The best diff checker for most quick comparisons is AyeTab's free Text Diff, because it opens in a browser tab, needs no account and never uploads what you paste. For folders, merges or very large files, a desktop tool like WinMerge or Meld earns its place, and Git users already have one built in.

Facebook Ad Library search: by page name or by keyword

A Facebook Ad Library search works in one of two ways: look up one advertiser by its page name, or look up a word and see every active ad that uses it. You can do either for free in Meta's own library, or run the same search through seogeoaeo.ai to get the results back as a sorted report.

Hreflang examples for HTML, HTTP headers and sitemaps

Here are working hreflang examples for all three methods Google accepts: link tags in the HTML head, an HTTP Link header, and an XML sitemap. Pick one method per site, copy the pattern below, and test a live page with the seogeoaeo.ai Hreflang Checker before you call it done.

How to reduce Codex token usage: 7 habits that work

The fastest way to reduce Codex token usage is to keep each chat short and focused: start a new chat for each task, compact long ones, and give Codex only the files it needs. Before you change anything, measure where your tokens go, because you cannot tell which habit helped without a before and…

GPTBot robots.txt rules: four snippets and what each one does

GPTBot robots.txt rules take two lines: a User-agent: GPTBot line and a Disallow or Allow line under it. Below are four snippets you can copy, what each one tells OpenAI, Anthropic and Perplexity, and how to confirm the result with the pay-per-run AI crawler checker on seogeoaeo.ai.

RTX 5090 restock: the short way to catch one

There is no published schedule for an RTX 5090 restock, so the only reliable way to catch one is to be told the minute a listing turns buyable. Set an AyeWatch monitor on the 5090 product pages you would buy from, keep push alerts on, and have checkout ready before anything happens.

Free keyword clustering tool options, and where they stop

A free keyword clustering tool usually means one of three things: a spreadsheet you sort by hand, a short script you run yourself, or a trial of a paid service. If your time is worth more than a few cents, the practical answer is a pay-per-run tool such as seogeoaeo.ai's clusterer, which groups a…

Warp credits reset monthly, but purchased usage runs on its own clock

Warp credits reset once a month: the included usage on your plan renews monthly, even if you pay yearly, and anything you did not use is gone. Purchased usage works differently, since it carries over and expires 12 months after you buy it. To see your own reset date, open Settings > Billing and…