Tools

All tools run locally in your browser. Nothing is uploaded.

Development Encoding & Conversion Image Efficiency Calculators Other

Development

JSON Format/Minify

Pretty-print, minify, optional stable key sorting.

XML Format/Minify

Pretty-print or minify XML locally in your browser.

Convert between CSV and JSON (headers, delimiter options).

Compare two texts (or JSON) and generate a unified diff locally.

Test matches or do replacements with JavaScript RegExp.

Decode JWT header and payload locally (no verification).

Query String Parse/Build

Parse a URL/querystring into JSON, or build a querystring from JSON.

WebCrypto: SHA-256 / SHA-1 / SHA-384 / SHA-512.

Compute file hashes locally (SHA + CRC32).

CRC32 checksum for UTF-8 text (hex + decimal).

MD5 hash for UTF-8 text (hex or base64).

MD4 hash for UTF-8 text (hex or base64).

MD2 hash for UTF-8 text (hex or base64).

WebCrypto HMAC with SHA-256 / SHA-1 / SHA-384 / SHA-512.

AES-GCM Encrypt/Decrypt

AES-GCM + PBKDF2 (passphrase) in your browser.

RSA Hybrid Encrypt/Decrypt

Hybrid RSA-OAEP + AES-GCM for practical encrypt/decrypt.

Encoding & Conversion

Base64 Encode/Decode

UTF-8 text, URL-safe variant, optional padding removal.

Base32 Encode/Decode

RFC 4648 Base32 for UTF-8 text, optional padding removal.

Hex Encode/Decode

UTF-8 text ↔ HEX bytes (with optional separators).

URL Encode/Decode

encodeURIComponent / decodeURIComponent helpers.

Unicode Escape/Unescape

Escape and unescape \uXXXX / \u{...} / \xNN sequences.

HTML Escape/Unescape

Escape/unescape HTML entities like < > & " '.

Base58 Encode/Decode

Bitcoin alphabet Base58 for UTF-8 text.

Base85 (Ascii85) Encode/Decode

Ascii85/Base85 for UTF-8 text, optional “z” compression.

Escape/Unescape (JS)

Legacy JavaScript escape()/unescape() encoder/decoder.

Image

Image Compress/Resize

Compress, resize, and convert images locally in your browser.

Image → Base64

Convert images to Data URL / Base64 / HTML / Markdown locally.

Image Watermark

Add a text watermark to images locally in your browser.

Image Crop/Round

Center-crop images (aspect ratios) and export with rounded corners locally.

Color Converter

Convert between HEX/RGB/HSL color formats.

Efficiency

UTM Link Builder

Generate tracking links with UTM parameters locally.

Amazon Affiliate Link Builder

Generate Amazon /go links and affiliate URLs locally.

QR Code Generator

Generate QR codes locally (PNG/SVG) with colors and error correction.

QR Code Scanner

Scan QR codes from an image or camera locally in your browser.

Password Generator

Generate strong random passwords locally.

Generate UUID v4 locally in your browser.

UUID v7 Generator

Generate time-ordered UUID v7 locally in your browser.

Nano ID Generator

Generate short URL-safe IDs locally.

Generate time-sortable ULIDs locally in your browser.

Random Bytes Generator

Generate random bytes / API keys locally (hex, base64, base64url).

Lorem Ipsum Generator

Generate lorem ipsum text locally.

Text Case Converter

Convert between common casing styles (camel, snake, kebab, title…).

Text Lines Tool

Sort, dedupe, and clean up text lines.

Calculators

Time Zone Converter

Convert date/time between time zones (DST-aware).

Timestamp Converter

Convert between Unix timestamps and dates.

Date Difference

Compute time differences between two dates (days, hours, minutes).

Percentage Calculator

Quick percent calculations: X% of Y, change, increase/decrease.

Calculate tip, total, and split per person.

Discount Calculator

Calculate discount amount, final price, and totals (with optional sales tax).

Sales Tax Calculator

Compute sales tax and totals (add tax or tax-included).

Mortgage Calculator

Estimate payment, totals, and payoff with extra payments.

Home Affordability Calculator

Estimate how much house you can afford using income, debts, and loan assumptions.

Loan Calculator

Calculate loan payments, totals, and payoff with extra payments.

50/30/20 Budget

Split your monthly income into needs, wants, and savings using the 50/30/20 rule.

APR ↔ APY Converter

Convert between APR and APY with compounding frequency.

Salary Calculator

Convert between annual salary and hourly pay (monthly/biweekly/weekly).

Take-Home Pay Calculator

Estimate paycheck take-home pay using custom tax rates and deductions.

Auto Loan Calculator

Estimate car payment (price, trade-in, down payment, taxes, fees).

Net Worth Calculator

Calculate net worth from assets and liabilities.

Credit Utilization Calculator

Calculate credit utilization per card and overall (balance ÷ limit).

Emergency Fund Calculator

Estimate emergency fund target and time to reach it.

Inflation Calculator

Estimate future value or today’s value using an inflation rate.

4% Rule Calculator

Estimate retirement savings needed using a withdrawal rate (e.g., 4%).

FIRE Number Calculator

Calculate your FIRE number and estimate years to financial independence.

Gas Cost Calculator

Estimate fuel needed and total gas cost for a trip (miles, MPG, $/gal).

Rent Affordability

Estimate max affordable rent (or required income) using the rent-to-income rule.

Rent vs Buy Calculator

Compare renting vs buying over time and estimate break-even.

Debt-to-Income (DTI)

Calculate debt-to-income ratio (DTI) from monthly income and debts.

Credit Card Payoff

Estimate payoff time and interest for a credit card balance.

Debt Payoff Planner

Plan debt payoff with snowball or avalanche strategy across multiple debts.

Compound Interest

Estimate future value with monthly contributions and compounding.

Investment Fees Calculator

Estimate how investment fees (expense ratio) affect long-term growth.

Savings Goal Calculator

Estimate time to reach a savings goal or required monthly savings.

401(k) & Retirement Calculator

Estimate retirement savings growth with contributions and employer match.

CAGR Calculator

Calculate compound annual growth rate (CAGR) and total return.

Calculate BMI (Body Mass Index) locally and show the healthy range.

Convert between common units (length, mass, temperature, data size…).

Number Base Converter

Convert numbers between bases (2-36).

IPv4 CIDR Calculator

Compute netmask, network, broadcast, and host range from CIDR.

Other

ROT13 transform for A-Z / a-z text.

Morse Encode/Decode

Encode and decode International Morse code.

Daily Horoscope

Daily horoscope by zodiac sign (for entertainment only).

Zodiac Compatibility

Fun compatibility score and tips by zodiac sign (entertainment only).