ToolBento guides
Practical browser-tool workflows
Short guides for text cleanup, developer formatting, SEO utilities, calculators, PDFs, images, and everyday productivity tasks.
How to calculate compound interest on savings
Estimate future value and total gain from a starting balance, annual interest rate, and number of years.
Read guide →How to calculate age from date of birth
Find exact age in years, months, and days from a birth date, or calculate age on a specific future or past date.
Read guide →How to write a meta description for SEO
Draft a short search-result description from a page title and main benefit, then trim it before publishing.
Read guide →How to encode text as Base32 online
Convert readable text into Base32 output, choose UTF-8 or Latin-1 input, and wrap long encoded strings for safer copying.
Read guide →How to encode and decode URL strings
Convert spaces, symbols, and query text into URL-safe encoding, or decode encoded links so copied parameters are easier to read.
Read guide →How to encode and decode Base64 text
Convert plain text to Base64, decode Base64 back to readable text, and catch common copy mistakes in developer and support workflows.
Read guide →How to decode Base58 text online
Decode Base58 strings into readable text or hex bytes, and check common copy mistakes before using the result in a wallet, token, or developer workflow.
Read guide →How to encode and decode HTML entities
Turn special HTML characters into safe entities, or decode common entities back to readable text for snippets, docs, and CMS cleanup.
Read guide →How to calculate BMI from height and weight
Calculate body mass index from weight in kilograms and height in centimeters, then read the basic BMI category with the right context.
Read guide →How to calculate a monthly loan payment
Estimate monthly payments, total paid, and interest from a loan amount, annual interest rate, and term in months.
Read guide →How to calculate a percentage of a number
Find a percent of an amount, then check the increased and decreased values for discounts, raises, fees, grades, and quick comparisons.
Read guide →How to calculate VAT or GST on a price
Add tax to a net amount or remove included VAT/GST from a gross price so invoices, quotes, receipts, and checkout estimates are easier to check.
Read guide →How to calculate profit margin from revenue and cost
Work out profit, margin, and markup from revenue and cost of goods sold so pricing decisions are easier to compare.
Read guide →How to test a regex pattern online
Check a regular expression against sample text, review each match, and catch pattern mistakes before using it in code, redirects, filters, or cleanup work.
Read guide →How to convert currency for a travel budget
Convert prices between currencies with live exchange-rate data when available, then use the result to estimate trip costs, shopping decisions, and card charges.
Read guide →How to convert a Unix timestamp to a readable date
Turn Unix timestamps in seconds or milliseconds into local and ISO dates so logs, API payloads, and expiry fields are easier to debug.
Read guide →How to calculate Stripe fees and net revenue
Estimate Stripe-style processing fees, net received, and the amount to charge when you need a target net payment.
Read guide →How to calculate business days between two dates
Count weekdays between a start date and an end date for project timelines, invoice terms, delivery estimates, and deadline planning.
Read guide →How to calculate a discount and final sale price
Work out the sale price and savings from an original price and discount percentage before you buy, quote, or publish a promotion.
Read guide →How to calculate a SaaS subscription price
Estimate a monthly SaaS price from fixed costs, per-customer costs, target customers, profit margin, and payment fees.
Read guide →How to calculate days between two dates
Find the number of days between a start date and an end date for trips, deadlines, invoices, habits, and planning notes.
Read guide →How to split a restaurant bill with tip evenly
Calculate the tip, total, and per-person amount from a restaurant bill so everyone knows what to pay before the card or cash comes out.
Read guide →How to build a cron expression for scheduled jobs
Create a five-field cron schedule from plain inputs so scripts, backups, reports, and recurring jobs run at the time you expect.
Read guide →How to generate a SHA-256 hash from text
Create a deterministic SHA-256 hash for text so you can compare values, document checksums, and test developer workflows.
Read guide →How to calculate PayPal fees and net payment
Estimate PayPal-style processing fees, the net amount you keep, and the gross amount to charge when you need a target net payment.
Read guide →How to decode a JWT token and read its claims
Inspect a JSON Web Token header, payload, and expiry claim so you can debug authentication problems without verifying or changing the token.
Read guide →How to make an Open Graph image for a website
A practical way to make a clean social preview image for a blog post, landing page, product page, or small launch.
Read guide →How to calculate ROI for a small business project
Estimate return on investment from revenue and investment cost so you can compare campaigns, equipment, services, and experiments.
Read guide →How to create a QR code for a website link
Generate a scannable QR code from a URL or short text so people can open your page from posters, menus, labels, and handouts.
Read guide →How to create a robots.txt file for a small website
Generate a simple robots.txt file with a crawl rule and sitemap location so search engines can discover your important pages.
Read guide →How to compare unit prices while grocery shopping
Compare package prices by unit so you can spot the better deal on groceries, household supplies, and bulk buys.
Read guide →How to create clean URL slugs from titles
Turn page titles, blog headlines, and product names into readable URL slugs that are short, consistent, and search friendly.
Read guide →How to estimate AI prompt tokens and cost before you send
Plan LLM prompts with rough token counts, expected output size, context-window fit, and approximate model cost before calling an AI API.
Read guide →How to calculate hourly pay from an annual salary
Convert a yearly salary into hourly, weekly, and monthly pay so you can compare jobs, contracts, and schedules more clearly.
Read guide →How to count words online without uploading your text
A privacy-first workflow for checking word count, character count, and paragraph length directly in the browser.
Read guide →How to format and validate JSON safely
Paste JSON, catch syntax errors, and copy clean output without installing a desktop editor.
Read guide →How to build trackable UTM campaign links
Create consistent source, medium, and campaign parameters for newsletters, ads, and social posts.
Read guide →How to merge PDF files in your browser
Combine multiple PDFs locally and download a single document while keeping files on your device.
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