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Most Popular Tools

The most frequently bookmarked tools by our users

Image Compressor

Compress JPG, PNG, and WebP images by up to 80% without losing quality.
Merge PDF

Combine multiple PDF files into one clean document instantly.
Word Counter

Count words, characters, sentences, paragraphs, and reading time in real time.
JSON Formatter

Format, validate, beautify, and minify raw JSON string inputs.
Password Generator

Generate secure, cryptographically random passwords with custom symbols.
QR Code Generator

Create custom QR codes for URLs, text, Wi-Fi, and contact details.
JPG to PDF

Convert JPG and PNG images into a clean single PDF file.
Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, and snake_case.
Base64 Encoder

Encode text or images into standard Base64 format strings.
Percentage Calculator

Calculate percentage of values, percentage differences, and changes easily.
Color Picker

Pick colors from screen or image and export HEX, RGB, and HSL formats.
SERP Preview Tool

Simulate how your meta title and description appear in Google search results.

Why Choose TinyToolzz?

Built from the ground up for radical speed, privacy, and simplicity

Privacy First
Your files never leave your device. All processing occurs 100% locally in your web browser.
Lightning Fast
No server uploads or queues. Execution starts instantly and returns results in milliseconds.
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150+ Tools
A complete utility suite for images, PDFs, developer tasks, text, calculators, and converters.
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Frequently Asked Questions

Everything you need to know about using TinyToolzz

What is TinyToolzz?
TinyToolzz is a browser-based suite of online utilities for images, PDFs, text, developer code, calculators, and unit converters. Every tool runs directly inside your web browser.
Are all tools on TinyToolzz free?
Yes. All tools on TinyToolzz are 100% free with no premium plans, hidden subscriptions, or daily limits.
Do I need to create an account?
No. You never need to sign up, provide an email address, or log in to use any tool on TinyToolzz.
Is my data safe? Do files get uploaded to a server?
Your files and text inputs are completely private. All processing is performed client-side using JavaScript and Web APIs. Zero file data is ever transmitted to external servers.
Do the tools work on mobile devices?
Yes! TinyToolzz is designed mobile-first and works seamlessly across iOS Safari, Android Chrome, mobile browsers, tablets, and desktop computers.

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JWT Decoder

Decode and inspect JSON Web Tokens (JWT) online for free. Parse header parameters, payload claims, issuer data, and expiration dates instantly inside your web browser.

Decoded Header (Algorithm & Type) Algorithm: -
Decoded Payload (Claims & Data) Status: -
Parsed Standard Claims & Timestamps
Issuer (iss) -
Subject (sub) -
Issued At (iat) -
Expires At (exp) -

Technical Specifications

Standard Compliance JSON Web Token (JWT) RFC 7519 & Base64Url RFC 4648
Algorithm Support HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, PS256, none
Timestamp Parsing Automatic conversion of UNIX epoch timestamps (exp, iat, nbf) to UTC date strings
Execution Context 100% Client-side JavaScript (browser thread)
Privacy Guarantee Zero network requests — authorization tokens never leave client device memory

Key Features

Instant Token Parsing
Decode JWT tokens into human-readable JSON header and payload objects with structured indentation.
100% Private & Client-Side
All Base64Url decoding and claim checks occur locally inside browser memory. Zero network logging or server uploads.
Expiration & Date Formatting
Convert numeric epoch timestamps (`exp`, `iat`, `nbf`) into clear human-readable date and time strings.
Detailed Syntax Inspection
Detect invalid Base64Url characters, broken JSON payloads, or missing token segment delimiters immediately.

How to Decode a JWT Token

  1. 1
    Paste Encoded JWT String
    Paste your authorization token or encoded JWT into the top input box, or click "Load Sample JWT".
  2. 2
    Click Decode Token
    Click "Decode Token" to parse the three token segments (Header, Payload, and Signature).
  3. 3
    Inspect Header & Claims
    Review algorithm parameters, payload user claims, issuer details, and formatted expiration timestamps.
Client-Side Privacy Guarantee
All Base64Url parsing and token decoding run strictly within your browser memory. Your authentication tokens, API keys, and session secrets are never sent to external servers.

Frequently Asked Questions

What is a JSON Web Token (JWT) and why decode it?

A JSON Web Token (JWT) is an open standard (RFC 7519) used to securely transmit information between parties as a JSON object. Decoding a JWT allows developers to inspect its header parameters, claims payload, expiration timestamp, and issuer data.

Is my JWT token or secret key uploaded to any server?

No. All Base64Url decoding and claim parsing take place 100% inside your local web browser. Your JWT tokens, user tokens, and authorization headers are never transmitted to any external server.

Does decoding a JWT verify its cryptographic signature?

Decoding parses and reveals the readable JSON contents of the header and payload. Signature verification requires the secret key or public key signature check, which should be verified on your secure backend server.

How does the tool handle Base64Url decoding?

The tool converts Base64Url-encoded strings to standard Base64 by padding missing equals signs and swapping URL-safe characters (- to +, _ to /) before parsing the JSON data.

How are JWT timestamps (exp, iat, nbf) formatted?

Numeric UNIX epoch timestamps contained in payload claims like exp (expiration), iat (issued at), and nbf (not before) are converted into human-readable date and time strings.

Is this JWT decoder free to use?

Yes. The JWT Decoder is 100% free with zero token length limits, no registration required, and full browser privacy.

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