Free online tools that do one job well

Calculators, converters, and generators. No signup, nothing uploaded to a server — everything runs in your browser.

Calculators

Instant math for sellers, streamers, and pros.

Etsy Fee Calculator

Calculate exact Etsy seller fees for 2026 — listing, transaction, payment processing, and offsite ads — and see your real profit.

Twitch Bits to USD

Convert Twitch Bits to dollars. See what viewers pay per pack and what streamers actually earn.

Tattoo Price Calculator

Estimate tattoo cost by size, detail, placement, and artist rate before your consultation.

Loan Calculator

Calculate monthly payments, total interest, and see a full amortization schedule for any loan.

Compound Interest

See how your money grows over time. Visualize the power of compound interest and regular contributions.

Salary Calculator

Convert between annual salary and hourly rate. See earnings per month, week, and day.

Profit Margin Calculator

Calculate profit margin, markup, and break-even point. Understand the difference between margin and markup.

Calculate tip amount and split the bill. Quick buttons for 15%, 18%, 20%, and 25%.

Calculate your Body Mass Index in metric or imperial units, with category and healthy range.

Exact age in years, months, and days — plus a countdown to your next birthday.

Date Calculator

Days between two dates, or add and subtract days. Weeks, months, and working days included.

Converters

Transform data between formats, right in your browser.

Paste YAML, get clean JSON instantly. Runs locally — your config files never leave your machine.

Format, minify, or validate JSON syntax instantly. Shows errors with line and position info.

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to plain text. Supports Unicode. Runs in your browser.

Convert length, weight, temperature, volume, speed, and area instantly as you type.

Generators

Creative name ideas for every project.

Band Name Generator

Generate unique band names by genre and vibe. Rock, metal, indie, hip-hop, electronic and more.

QR Code Generator

Generate a QR code from any URL or text. Download as PNG instantly. Free, no signup.

Random Number Generator

Cryptographically secure random numbers for drawings, games, and sampling.

Convert text between 8 cases: UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.

Lorem Ipsum Generator

Generate classic placeholder text by paragraphs, sentences, or words.

AI-POWERED

Tools powered by AI — unique results every time.

AI Text Rewriter

Rewrite any text in a different style — professional, casual, concise, persuasive, or academic.

AI Bio Generator

Generate 5 unique social media bios for any platform and profession. Powered by AI.

AI Text Summarizer

Paste any text and get a concise AI-generated summary. Compare word counts instantly.

AI Email Writer

Write professional emails in seconds. Choose the type and tone, describe your context, and let AI draft it.

AI Hashtag Generator

Generate 30 relevant hashtags for any social media post. Mix of popular, medium, and niche tags.

AI Grammar Checker

Fix grammar, spelling, and punctuation with a full list of every correction made.

Rewrite any text in five modes: Standard, Fluent, Academic, Creative, or Shorter.

AI Cover Letter Writer

Get a tailored cover letter from the job title, company, and your experience.

UTILITIES

Everyday tools for developers, creators, and professionals.

Character Counter

Count characters, words, and sentences in real-time. See platform-specific limits with progress bars.

Invoice Generator

Create a professional invoice and print it as PDF. All data stays in your browser.

Pick any color and convert between HEX, RGB, and HSL. See complementary and analogous colors.

GUIDES

Deep dives that pair with our calculators.

Etsy Fees Explained 2026

Every fee in the 2026 US schedule with a worked $40 order showing exactly where the money goes.

Twitch Bits Guide

The six official pack prices, the flat $0.01 per bit payout, and the real value of any cheer.

Margin vs Markup

The $10 confusion that costs sellers money — with formulas, examples, and break-even math.

Why SearCalc?

Basic online tools should be fast, free, and private. Every tool here runs entirely in your browser — nothing is uploaded, no account is needed, and there are no usage limits. Bookmark the ones you use and they load instantly next time.