Browser tools for everyday developer work

Encoders, formatters, and calculators that run entirely in your browser. Nothing you paste is ever uploaded to a server.

Encode / Decode

TOOL / B64

Base64 Encode & Decode

Convert text to Base64 and back, with URL-safe and line-wrap options.

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TOOL / IMG

Base64 Image Encoder

Turn images into Base64 data URIs, with optional compress, resize and convert.

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TOOL / IMGD

Base64 Image Decoder

Paste a data URI or Base64 string and download the image.

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TOOL / URL

URL Encode & Decode

Percent-encode and decode URLs and query parameters.

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TOOL / BASE

Number Base Converter

Binary, octal, decimal and hex, plus bitwise ops and a two's-complement view.

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TOOL / JWT

JWT Decoder

Decode a JSON Web Token and verify its HMAC signature.

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TOOL / JWTG

JWT Generator

Build and sign a JSON Web Token with HS256, HS384 or HS512.

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Formatters

TOOL / JSON

JSON Formatter

Beautify, minify and validate JSON, with a tree view and copyable JSON paths.

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TOOL / JDIFF

JSON Diff

Compare two JSON documents and see exactly what changed, with JSON paths.

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FMT / CSV

CSV ↔ JSON Converter

Convert CSV to JSON and back, with real RFC 4180 quoting and a live preview.

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FMT / YAML

YAML ↔ JSON Converter

Convert YAML to JSON and back — a documented subset, with the Norway problem flagged.

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FMT / CSS

CSS Minifier & Beautifier

Minify or beautify CSS in your browser, without ever changing a code token.

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FMT / JS

JavaScript Minifier & Beautifier

Minify or beautify JavaScript safely — whitespace and comments only.

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FMT / HTML

HTML Minifier & Beautifier

Minify or beautify HTML, leaving pre, textarea and script content untouched.

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FMT / PHP

PHP Minifier & Beautifier

Minify or beautify PHP code, leaving embedded HTML exactly as written.

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FMT / SCSS

SCSS Minifier & Beautifier

Minify or beautify SCSS, with nesting and #{} interpolation handled.

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FMT / LESS

LESS Minifier & Beautifier

Minify or beautify LESS, with @variables and @{} interpolation handled.

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FMT / TS

TypeScript Minifier & Beautifier

Minify or beautify TypeScript, including generics and decorators.

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FMT / SQL

SQL Formatter

Format SQL onto readable lines, or collapse it to a single line.

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Hashing

TOOL / HASH

Hash Generator

MD5, SHA-1, SHA-2, SHA-3 and HMAC for text or files, in your browser.

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TOOL / FHASH

File Hash Generator

Checksum files of any size without uploading them.

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TOOL / HMAC

HMAC Generator

Sign a message with a secret key using HMAC-SHA256 and friends.

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TOOL / CHECK

Hash Checker

Verify a download against a published checksum.

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TOOL / CMP

Hash Comparison

Compare two hash strings and see where they differ.

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Generators

TOOL / QR

QR Code Generator

Create QR codes for URLs, Wi-Fi, contacts, email, SMS, events and more.

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Image Tools

IMG / COMPR

Advanced Image Compressor

Compress one or many images with a live before/after comparison.

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Calculators

CALC / PCT

Percentage Calculator

Find a percentage of a number, a percentage relationship, or a change.

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CALC / AGE

Age Calculator

Exact age in years, months and days, plus your next birthday.

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CALC / DDIFF

Date Difference Calculator

Find the exact time between two dates, in days, weeks or business days.

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CALC / TS

Timestamp Converter

Unix epoch to human-readable and back, with real timezone/DST handling.

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CALC / DISC

Discount Calculator

Find the discount amount and final price from an original price and percentage off.

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CALC / GST

GST Calculator

Calculate GST exclusive or inclusive, with a CGST/SGST split.

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CALC / EMI

EMI Calculator

Monthly loan installment, total interest and total payment.

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CALC / EMI+

Advanced EMI Calculator

Full amortization schedule, prepayment simulator and loan comparison.

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CALC / TDUR

Time Duration Calculator

Find the duration between two times of day, including across midnight.

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CALC / FUEL

Fuel Cost Calculator

Estimate fuel needed and trip cost from distance, mileage and fuel price.

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CALC / CNTD

Countdown Timer

Count down to any date and time, with a pause/resume and a shareable link.

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CALC / STPW

Stopwatch

Start, pause, lap and reset with millisecond precision.

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Checkers

TOOL / IP

What Is My IP Address

See your public IPv4 and IPv6 address, ISP and request headers.

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Security

TOOL / AES

AES Encrypt & Decrypt

Encrypt or decrypt text and files with AES-GCM/CBC/CTR, entirely in your browser.

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TOOL / PWGEN

Password Generator

Generate strong random, pronounceable or PIN passwords, entirely in your browser.

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TOOL / PWCHK

Password Strength Checker

Check password strength, crack-time estimates and policy rules in your browser.

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Schemas

SCHEMA / AVRO

Avro Schema Viewer

Validate an Avro schema and get its canonical form and fingerprints.

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SCHEMA / PROTO

Protobuf Schema Viewer

Explore a .proto file with field presence, editions features and JSON names.

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SCHEMA / COMPAT

Schema Compatibility Checker

Compare two schema versions and see exactly what breaks.

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SCHEMA / WIRE

Protobuf Decoder

Decode a protobuf payload, with or without the .proto file.

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SCHEMA / SAMPLE

Schema Sample Data

Generate realistic sample JSON from an Avro or Protobuf schema.

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Personal Finance

FIN / CTC

CTC → In-Hand Salary Breakdown

See exactly how CTC becomes take-home pay — every line item, not just one number.

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FIN / TAX

Old vs New Tax Regime Comparison

Compare old vs new income tax regimes, and see the income where the answer flips.

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FIN / SIP

SIP Calculator — Inflation-Adjusted Real Returns

SIP future value, plus what that corpus is actually worth after inflation.

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FIN / SPLIT

Split the Bill / Group Settlement

Turn a pile of group expenses into the fewest possible settling payments.

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Text Tools

TXT / REGEX

Regex Tester & Explainer

Test a pattern live, see it explained in plain English, and catch backtracking risk.

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TXT / DIFF

Text Diff Checker

Compare two pieces of text line by line, with a real shortest-edit-script diff.

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TXT / CASE

Case Converter

One paste, every naming convention at once — camelCase, snake_case and more.

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TXT / WC

Word & Character Counter

Live counts, reading time, and two readability scores shown side by side.

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