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Utility tools

General-purpose tools for developers and everyday tasks: QR codes, Base64 and URL encoding, hashing, UUIDs, JSON/CSV formatting and conversion, regex testing, and text/number utilities like a word counter and unit converter. Nothing you type or upload here is sent anywhere.

Generate a QR code for a link, Wi-Fi network, or contact card

Convert a CSV export into JSON for an API

Validate and pretty-print a JSON payload

Decode a JWT to inspect its claims

21 tools

QR Code Generator

Turn text or a URL into a downloadable QR code.

Word Counter

Word, character, sentence, and paragraph counts.

CSV ⇄ JSON Converter

Convert a data file between CSV and JSON.

Base64 Converter

Encode any file to Base64, or decode it back.

Password Generator

Random passwords with adjustable length and character sets.

Hash Generator

SHA-1/256/384/512 hash of text or a file.

UUID Generator

Generate v4 UUIDs one at a time or in bulk.

Case Converter

Convert text between UPPER, camelCase, snake_case, and more.

JSON Formatter & Validator

Pretty-print, minify, and validate JSON.

Text Diff Checker

Compare two texts and highlight what changed.

Text to ASCII Art

Turn a word or phrase into a block-letter banner.

Timestamp Converter

Unix timestamp ↔ human-readable date and time.

URL Encoder / Decoder

Encode/decode URL components, or break a URL down.

Regex Tester

Test a regex against sample text, live.

Regex Generator

Pick a common regex pattern and test it live.

JWT Decoder

Decode a JWT's header and payload.

Color Converter

Convert a color between hex, RGB, and HSL.

Unit Converter

Convert length, weight, temperature, and volume.

Lorem Ipsum Generator

Generate words, sentences, or paragraphs of filler text.

List Sorter & Deduplicator

Sort, shuffle, or deduplicate a line-by-line list.

Number Base Converter

Convert between binary, octal, decimal, and hex.

Utility tools guides

How a QR Code Actually Stores Data in a Grid of Squares

A QR code isn't a picture of a link, it's a direct encoding of the data itself into a black-and-white grid, with enough built-in redundancy to still scan correctly even when part of it is damaged or covered.

Sep 66 min read

CSV vs JSON: Choosing the Right Data Format

When a flat spreadsheet-friendly format beats a nested, structured one, and the specific problems that show up when you pick the wrong one for the job.

Aug 316 min read

Base64 Encoding Explained: What It Is and When to Use It

Why Base64 exists, what it actually does to your data, and the difference between encoding something and encrypting it, a mix-up that causes real security mistakes.

Aug 315 min read

How to Generate a Password That's Actually Secure

Why length matters more than special characters, what entropy actually measures, and how a random password generator differs from a hash or a UUID.

Aug 158 min read

Frequently asked

Are these tools actually free?

Yes. Every tool on this page is free to use, with no usage limits, watermarks, or paywalled features.

Is my file or data uploaded to a server?

No. Every tool listed here processes your file or input directly in your browser tab; nothing is sent to YourFileKit's servers or any third party.

Do I need to create an account?

No sign-up is required to use any tool. An optional account only exists for saving preferences like favorites across visits.

Is Base64 encoding or hashing done securely?

Encoding and hashing run entirely in your browser using standard Web Crypto / JavaScript APIs. Nothing you paste in is ever transmitted, which also makes these tools safe for tokens or keys you wouldn't want to send to a third-party server.

Can I use the QR code generator for Wi-Fi or contact info, not just links?

Yes. It supports plain URLs, Wi-Fi network credentials, and vCard contact info, not just plain text.