A curated collection of free browser-based tools for developers, writers, students and everyday users. No signup, no tracking.
Count words, characters, sentences and reading time in real time. Free forever.
Count characters for Twitter, Instagram, SMS and LinkedIn. Platform limits shown live.
Flesch-Kincaid reading ease score and grade level for any text instantly.
UPPERCASE, lowercase, camelCase, snake_case, Title Case and more in one click.
Generate UUID v1, v4, v5, v7, GUID and Nil UUIDs. RFC 9562 compliant. uuidcore.com
Check how strong your password is instantly. 100% client-side. passwordstrength.net
Decode Base64 strings and files in your browser. base64decode.tools
Encode text or files to Base64 format instantly. base64encode.tools
URL encode and decode strings and query parameters. urlencodedecode.com
Format, validate, minify and convert JSON in your browser. jsontools.tools
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text or file. hashgenerator.tools
Calculate area for rooms, floors and land. thesquarefootagecalculator.com
Calculate percentages, percentage change and more. bestpercentagecalculator.net
Calculate exact age in years, months and days from any date. theagecalculator.net
Convert between Unix timestamps and human-readable dates across any timezone. epochtime.tools
Repeat any text up to 100,000 times with custom separators. textrepeat.net
Build and decode cron expressions with plain-English explanations. crontabsheet.com
Build, test, and explain regular expressions with code in 7 languages. regexguide.com
Convert text between Title Case, sentence case, camelCase, snake_case, kebab-case and more. transformcase.com
Engineering and scientific unit converter with printable reference tables. unitcheatsheet.com
Hours, timesheets, and overtime pay. Breaks, overnight shifts, and 50+ time zones. calculatehours.net
Online alarm clock, timer, stopwatch, and world clock. Browser-based, no signup. clockwithus.com
Convert between profit margin and markup, with fees, shipping, tax, and break-even. marginvsmarkup.com
Billable shipping weight for FedEx, UPS, USPS, DHL and more carriers. dimweightcalc.com
Calculate the volume of a box from its length, width, and height in any units. boxvolumecalculator.com
Parcel length-plus-girth against carrier limits, plus body circumference for fitness. girthcalculator.com
Free, unbiased solar and off-grid calculators — sizing, payback, and battery banks. prosolarcalc.com
Calculate, split, and visualize subnets. IPv4/IPv6, VLSM, cloud-aware, Terraform export. cidrcalculator.net
Network/broadcast addresses, usable host range, wildcard masks, and VLSM planning. subnetmaskcalc.net
Browser-based image tools — compress, convert, resize, crop, and watermark. No uploads. pictoolkit.com
Strip EXIF, GPS, and hidden metadata from images, PDFs, and Office files, in-browser. removemetadata.tools