Word Counter
Count words, characters, sentences, paragraphs, reading time, speaking time, and writing metrics in the browser.
Find tools by workflow
All free browser tools in one searchable index.
Search the complete Text Metrics Tools library for writing checks, SEO previews, AMZ seller math, marketplace shortcuts, and simple calculators. Every core tool opens without login.
Tip: search by job, platform, or metric. Examples: listing, reading time, duplicate lines, TACoS, percentage.
Keyword Density Checker
Review word frequency, repeated terms, density, and overused phrases before publishing or optimizing a draft.
JSON Formatter
Pretty print, minify, and validate JSON for API responses, schema markup, webhook payloads, and config files.
CSV to JSON Converter
Convert spreadsheet exports, product feeds, and tabular data into JSON arrays with quoted comma support and optional type inference.
JSON to CSV Converter
Convert JSON objects and arrays into spreadsheet-ready CSV with escaped commas, quotes, and line breaks.
URL Encoder Decoder
Encode URL components, decode query strings, and clean API links or UTM parameters without sending data to a server.
SEO Title and Meta Description Preview
Draft titles, descriptions, and URLs while previewing desktop and mobile search result snippets.
Amazon ASIN Batch Opener
Paste ASINs and open matching Amazon marketplace pages in batches for faster competitor and listing checks.
Amazon FBA Profit Calculator
Estimate unit profit, margin, ROI, break-even ACoS, ad impact, and core FBA product economics.
Smart Restock Calculator
Plan replenishment timing from inventory, lead time, daily sales, safety stock, and expected stockout risk.
Percentage Calculator
Calculate percentage change, discounts, increases, proportions, and simple daily math without a spreadsheet.
Guides and Character Limits
Use focused guides for SEO title length, meta descriptions, platform character limits, Amazon formulas, and editing workflows.