More free tools

More free tools.

A directory of 28 free online tools — calculators, encoders, decoders, generators, and writing tools. Same design philosophy across the whole network.

A curated portfolio

textrepeat.net is part of a network of free, single-purpose online tools. Every site shares the same design philosophy: focused, fast, privacy-friendly, no signup, no upsell, no anti-adblock pop-ups.

📐 Calculator

Square Footage Calculator

Calculate square footage for rooms, floors, walls, and land. Supports rectangles, triangles, circles, and irregular shapes. Free and instant.

Area Real Estate Home
thesquarefootagecalculator.com
% Calculator

Percentage Calculator

Calculate percentages, percentage change, percentage difference, and more. Multiple calculation modes for everyday and professional use.

Math Finance Statistics
bestpercentagecalculator.net
🎂 Calculator

Age Calculator

Calculate exact age in years, months, days, hours, and minutes from any date. Find the difference between two dates instantly.

Date Time Birthday
theagecalculator.net
🔓 Encoder / Decoder

Base64 Decode

Decode Base64-encoded strings and files instantly in your browser. Supports standard and URL-safe Base64. No data sent to servers.

Base64 Encoding Developer
base64decode.tools
🔒 Encoder / Decoder

Base64 Encode

Encode text or files to Base64 format instantly. Supports standard and URL-safe Base64 encoding. Free and client-side.

Base64 Encoding Developer
base64encode.tools
🔗 Encoder / Decoder

URL Encode / Decode

URL encode and decode strings, query parameters, and full URLs. Handles all special characters and Unicode. Essential developer tool.

URL Encoding Developer
urlencodedecode.com
🔐 Security

Password Strength Checker

Check the strength of any password instantly. Get detailed analysis, crack time estimates, and improvement suggestions. 100% client-side.

Password Security Privacy
passwordstrength.net
📝 Writing Tool

Word Counter

Count words, characters, sentences, paragraphs, and reading time as you type. Useful for essays, blog posts, social media captions, and SEO content.

Words Writing SEO
wordcounterfree.com
🎲 Generator

UUID Generator

Free online UUID generator — v1, v4, v5, v7, GUID & Nil UUID. RFC 9562 compliant. No tracking, no logs. All generation happens in your browser.

UUID GUID Developer
uuidcore.com
{} Formatter / Validator

JSON Tools

Format, validate, minify, and convert JSON in your browser. Pretty-print messy JSON, spot syntax errors with line numbers, and switch between JSON, YAML, CSV, and XML.

JSON YAML Developer
jsontools.tools
# Cryptography

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 and other cryptographic hashes from any text or file. Useful for integrity checks, password hashing demos, and developer testing.

Hash SHA-256 Developer
hashgenerator.tools
⏱️ Developer Tool

Epoch Time Converter

Convert between Unix epoch timestamps and human-readable dates. Supports seconds, milliseconds, and microseconds. Time zone aware.

Time Unix Developer
epochtime.tools
Rx Text Tool

Text Repeater

Repeat any word, phrase, emoji, or sentence up to 100,000 times. Eight specialty tools for WhatsApp messages, emoji walls, stress-test data, Lorem Ipsum, and more.

Text WhatsApp Testing
textrepeat.net
🕒 Calculator

Hours Calculator

Work hours and timesheets — hours between times, weekly totals, overtime pay, time between dates, and 50+ time zones. No signup.

Time Payroll Timesheet
calculatehours.net
Reference

Unit Cheat Sheet

Engineering and scientific unit converter with printable reference tables — wire gauges, drill bits, thread specs, pipe sizes, and more.

Units Engineering Reference
unitcheatsheet.com
$ Calculator

Margin vs Markup

Convert between profit margin and markup, find break-even, and factor in platform fees, shipping, and tax. With multi-product comparison.

Pricing Finance Retail
marginvsmarkup.com
⚖️ Calculator

Dimensional Weight Calculator

Dimensional (billable) shipping weight for FedEx, UPS, USPS, DHL and 13 more carriers. Compare actual vs volumetric weight with 2026 divisors.

Shipping Logistics Carriers
dimweightcalc.com
📦 Calculator

Box Volume Calculator

Calculate the volume of a box from its length, width, and height in any units. Cubic feet, inches, meters — for shipping, storage, and packing.

Volume Shipping Packing
boxvolumecalculator.com
📏 Calculator

Girth Calculator

Parcel length-plus-girth against carrier size limits, plus body circumference measurements for fitness tracking. Two calculators in one.

Shipping Fitness Measurement
girthcalculator.com
☀️ Calculator

Solar Calculator

Free, unbiased solar and off-grid calculators — system sizing, savings and payback, battery banks, and country-specific incentive rules.

Solar Energy Off-grid
prosolarcalc.com
🌐 Networking

CIDR Calculator

Calculate, split, and visualize subnets. IPv4/IPv6, VLSM planner, cloud-aware reserved IPs (AWS, Azure, GCP), and Terraform export.

CIDR Subnet Developer
cidrcalculator.net
🖧 Networking

Subnet Mask Calculator

Network and broadcast addresses, usable host range, wildcard masks, and VLSM planning for IPv4 and IPv6. Cloud-aware, with a learn center.

Subnet Networking Developer
subnetmaskcalc.net
* * Developer Tool

Crontab Sheet

Build and decode cron expressions with plain-English explanations and next run times. Supports Unix, Quartz, AWS, and GitHub Actions.

Cron Scheduling Developer
crontabsheet.com
.* Developer Tool

Regex Guide

Build, test, and debug regular expressions with token-by-token plain-English explanations, a pattern library, and code in 7 languages.

Regex Testing Developer
regexguide.com
Aa Text Tool

Case Transformer

Convert text between Title Case (AP, Chicago, APA, MLA), sentence case, camelCase, snake_case, kebab-case, and more. Side-by-side preview.

Text Case Writing
transformcase.com
🖼️ Image Tool

Picture Toolkit

35+ browser-based image tools — compress, convert, resize, crop, and watermark. JPG, PNG, WebP, AVIF, HEIC. Files never leave your device.

Image Compress Convert
pictoolkit.com
Time Tool

Clock With Us

Online alarm clock, timer, stopwatch, and world clock that runs in your browser. Alarms ring even with the tab in the background.

Clock Alarm Timer
clockwithus.com
Mt Privacy Tool

Remove Metadata

Strip EXIF, GPS, and hidden metadata from images, PDFs, and Office files — locally in your browser, with a pre-strip inspector.

Privacy EXIF Metadata
removemetadata.tools

Common design principles

  • Browser-only: Every tool runs entirely in your browser. Your input never leaves your device.
  • No signup, no upsell: No paid tier, no premium plan, no "sign up for more features" pop-ups.
  • Dark mode: Every site has a dark mode toggle that persists across visits.
  • Live calculation: Results update as you type. No "Calculate" or "Submit" button.
  • Shareable URLs: Share a link that pre-fills the inputs so others see exactly what you did.
  • Mobile-first: Every interaction works smoothly on a phone, not just a desktop.

Why a portfolio approach?

Each site is focused on one task. A single mega-site with hundreds of tools (like some competitors) ends up cluttered and slow. By splitting tools across focused domains, each site loads fast, ranks well for its specific keywords, and stays easy to navigate.

Suggest a tool

If you have suggestions for tools we should build or add, email us via the contact page.