Every tool runs 100% in your browser
Fast, private tools that live in your browser.
Convert, calculate, encode, format — hundreds of utilities that run entirely on your device. Nothing uploaded. Nothing tracked. Bookmark it once and your work follows you.
No uploads
Your files and text never leave the device. Truly private by design.
Sub-second
Static pages, edge-cached. Every tool loads in a blink.
URL-shareable
Every tool's state is a link. Send your exact result to anyone.
Works offline
Install as an app and keep using it on planes, trains, subways.
Categories
Everything you need, organized by what you're trying to do.
72 tools · growing weekly
- 19 toolsDeveloper ToolsJSON, JWT, regex, cron, hashing, and more.
- 12 toolsText ToolsCase conversion, counting, diff, cleanup.
- 4 toolsColor ToolsConverters, palettes, contrast, gradients.
- 2 toolsImage ToolsResize, convert, compress — all client-side.
- 0 toolsPDF ToolsSplit, merge, compress, without uploading.
- 2 toolsData ConvertersJSON, YAML, CSV, XML, TOML, Base64.
- 3 toolsUnit ConvertersLength, weight, volume, temperature, time.
- 5 toolsCalculatorsPercentage, age, BMI, tip, dates.
- 5 toolsFinance CalculatorsMortgage, loan, compound interest, tax.
- 7 toolsDate & TimeTimestamps, timezones, cron, countdowns.
- 8 toolsEncoding & DecodingBase64, URL, HTML entities, hex, binary.
- 4 toolsWeb UtilitiesUA parser, QR codes, meta tags, sitemaps.
- 1 toolFile UtilitiesHashing, size conversion, format detection.
Recently added
View all →- Age CalculatorEnter a date of birth to see age in years, months, days, hours, minutes, and seconds. Optionally compute age at any past or future date.
- Angle ConverterConvert between degrees, radians, gradians, turns, arcminutes, and arcseconds. Instant, high-precision conversion in your browser.
- Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal. Supports huge numbers via BigInt. Handles 0b, 0o, 0x prefixes.
- Base32 Encoder / DecoderEncode any text to RFC 4648 Base32 (A-Z, 2-7) or decode Base32 back to text. UTF-8 safe. Runs in your browser.
- Base64 Encode / DecodeEncode or decode Base64 text. UTF-8 safe by default. Optional URL-safe variant. Runs entirely in your browser — nothing is uploaded.
- BMI CalculatorCalculate your Body Mass Index (BMI) in metric or imperial units. Shows category and healthy weight range for your height.
The last utility site you'll bookmark.
ToolVaults is free, ad-light, and open in spirit. No account walls. No dark patterns. Just tools that respect your time and your data.