Your Base64 data stays in your browser. Client-side only
HTML Sitemap & Tool Directory
Complete index of all available developer utilities, Base64 tools, document converters, and 74+ engineering guides. Every tool runs 100% client-side with complete privacy.
1. Developer & Text Utilities
Word Counter
Count words, characters, sentences, and estimated reading time
Launch Tool
Case Converter
Transform text to UPPERCASE, lowercase, camelCase, snake_case, etc.
Launch Tool
UUID Generator (v4 & v7)
Generate random UUID v4 and time-ordered v7 IDs
Launch Tool
Unix Timestamp Converter
Convert Epoch seconds and milliseconds to human dates and UTC
Launch Tool
Hash Generator
Calculate SHA-256, SHA-512, and MD5 checksums locally
Launch Tool
JWT Decoder
Inspect Header, Payload, and Signature claims of JSON Web Tokens
Launch Tool
URL Encoder & Decoder
Percent-encode and decode URL query parameters per RFC 3986
Launch Tool
JSON Validator & Formatter
Validate, beautify, minify, and auto-fix JSON syntax errors
Launch Tool
2. Base64 Encoding & Decoding Suite
Base64 Decoder
Decode Base64 strings to readable UTF-8 text with error checking
Launch Tool
Base64 Encoder
Encode plain text and code into standard Base64 and Base64URL
Launch Tool
Base64 Converter
All-in-one bidirectional converter for Base64 and Base64URL
Launch Tool
Base64 Encoder & Decoder
Dual-panel encoder and decoder for fast side-by-side workflows
Launch Tool
Base64 File Decoder
Convert Base64 binary strings back into downloadable PDFs and images
Launch Tool
Base64 URL Decoder
RFC 4648 Section 5 URL-safe decoder without padding errors
Launch Tool
Base64 to Image
Convert Base64 Data URIs into visible, downloadable PNG/JPG graphics
Launch Tool
Image to Base64
Convert image files into lightweight Base64 Data URI strings
Launch Tool
3. Documents, Media & Calculators
PDF Compressor
Compress PDF file size without quality loss directly in your browser
Launch Tool
Image Compressor
Batch compress JPG, PNG, and WebP images with instant previews
Launch Tool
HEIC to JPG Converter
Convert Apple iPhone HEIC photos to universal JPG files locally
Launch Tool
Tip Calculator & Splitter
Calculate percentage tips, split bills fairly, and round totals
Launch Tool
All Tools Hub
Comprehensive categorized dashboard of all web tools
Launch Tool
4. Engineering Guides & Tutorials (74+ Articles)
Base64 & Encoding6 min read
What is Base64 Encoding? Complete Guide & Visual Explanation
October 2, 2026Read →
Base64 & Encoding5 min read
How Base64 Decoding Works: Behind the 6-Bit Math
October 2, 2026Read →
Base64 & Encoding5 min read
Base64 vs Base64URL: RFC 4648 Standards Explained
October 2, 2026Read →
Base64 & Encoding6 min read
How to Decode Base64 in JavaScript, Node.js & TypeScript
October 2, 2026Read →
Base64 & Encoding5 min read
Decoding Base64 in Python: Practical Examples with base64 Module
October 2, 2026Read →
Base64 & Encoding5 min read
Base64 in HTTP Basic Authentication: How It Works & Security Facts
October 2, 2026Read →
Base64 & Encoding6 min read
Embedding Images with Data URIs vs External URLs: Performance Guide
October 2, 2026Read →
Base64 & Encoding5 min read
Is Base64 Encryption? Why It Does Not Protect Passwords
October 2, 2026Read →
Base64 & Encoding5 min read
How to Decode JSON Web Tokens (JWT) using Base64URL
October 2, 2026Read →
Base64 & Encoding4 min read
Base64 Padding Rules: Why Equal Signs (=) Matter
October 2, 2026Read →
Base64 & Encoding5 min read
Handling UTF-8 & Unicode in Base64: Avoiding Character Corruption
October 2, 2026Read →
Base64 & Encoding5 min read
Converting Hexadecimal to Base64 and Back: Binary Representations
October 2, 2026Read →
Base64 & Encoding5 min read
Email MIME Attachments: Why Email Still Relies on Base64
October 2, 2026Read →
Base64 & Encoding4 min read
Base64 in Golang: Encoding and Decoding Byte Slices with encoding/base64
October 2, 2026Read →
Base64 & Encoding5 min read
How to Decode Base64 to PDF Documents in the Browser
October 2, 2026Read →
JSON & APIs6 min read
What is JSON? Complete RFC 8259 Standard Guide
October 2, 2026Read →
JSON & APIs5 min read
Top 5 Common JSON Syntax Errors and How to Fix Them
October 2, 2026Read →
JSON & APIs4 min read
JSON Formatting vs Minification: When to Use Each
October 2, 2026Read →
JSON & APIs4 min read
Why Trailing Commas Break JSON (and How to Auto-Fix)
October 2, 2026Read →
JSON & APIs6 min read
How to Parse Large JSON in JavaScript Without Crashing
October 2, 2026Read →
JSON & APIs6 min read
JSON vs YAML vs XML: Data Serialization Formats Compared
October 2, 2026Read →
JSON & APIs6 min read
Best Practices for Designing RESTful JSON APIs
October 2, 2026Read →
JSON & APIs5 min read
Handling Dates and Timestamps in JSON: ISO 8601 vs Epoch
October 2, 2026Read →
JSON & APIs5 min read
JSON Schema Validation: Enforcing Data Contracts in APIs
October 2, 2026Read →
JSON & APIs4 min read
How to Safely Escape Special Characters in JSON Strings
October 2, 2026Read →
JSON & APIs5 min read
JSON vs JSON5 vs JSONC: Adding Comments to Configuration Files
October 2, 2026Read →
JSON & APIs5 min read
Preventing JSON Injection and Prototype Pollution in Web Apps
October 2, 2026Read →
JSON & APIs5 min read
Formatting JSON in the Terminal: The Essential jq Command Guide
October 2, 2026Read →
Images & HEIC5 min read
What is a HEIC File? Apple High Efficiency Image Container Explained
October 2, 2026Read →
Images & HEIC5 min read
HEIC vs. JPG: Compression, Quality, and Compatibility Compared
October 2, 2026Read →
Images & HEIC4 min read
Why Windows and Android Can't Open iPhone HEIC Photos
October 2, 2026Read →
Images & HEIC3 min read
How to Stop Your iPhone from Taking HEIC Photos (Camera Settings)
October 2, 2026Read →
Images & HEIC4 min read
How to Batch Convert HEIC to JPG in Bulk on Any Device
October 2, 2026Read →
Images & HEIC6 min read
HEIC vs. WebP vs. AVIF: Next-Gen Image Formats Compared
October 2, 2026Read →
Images & HEIC5 min read
Lossless vs Lossy Compression for Web Images: Choosing Wisely
October 2, 2026Read →
Images & HEIC5 min read
How In-Browser Client-Side Image Conversion Protects Your Privacy
October 2, 2026Read →
Images & HEIC4 min read
Converting iPhone Live Photos and Burst Shots to Standard JPEGs
October 2, 2026Read →
Images & HEIC6 min read
Image Optimization for Core Web Vitals: Faster Page Speeds
October 2, 2026Read →
Images & HEIC5 min read
EXIF Metadata in iPhone Photos: How Conversion Protects Location Data
October 2, 2026Read →
Images & HEIC5 min read
Preparing Product Images for E-Commerce: Dimensions, Ratios & Formats
October 2, 2026Read →
Tipping & Math4 min read
How to Calculate Tips in Your Head: 10%, 15%, and 20% Math Tricks
October 2, 2026Read →
Tipping & Math6 min read
Tipping Etiquette in the USA: Complete Restaurant & Service Guide
October 2, 2026Read →
Tipping & Math4 min read
Should You Tip Before or After Tax? Etiquette Experts Weigh In
October 2, 2026Read →
Tipping & Math5 min read
How to Split a Restaurant Bill Fairly with Friends
October 2, 2026Read →
Tipping & Math5 min read
Tipping for Food Delivery: DoorDash, Uber Eats & Grubhub Guidelines
October 2, 2026Read →
Tipping & Math6 min read
International Tipping Guide: When to Tip in Europe, Asia & Beyond
October 2, 2026Read →
Tipping & Math4 min read
Gratuity vs Service Charge: What Is the Legal Difference?
October 2, 2026Read →
Tipping & Math4 min read
Bartender Tipping Etiquette: Cash vs Card Open Tabs
October 2, 2026Read →
Tipping & Math4 min read
Hotel Tipping Guide: Bellhops, Housekeeping & Valet Services
October 2, 2026Read →
Tipping & Math5 min read
How Tip Pooling Works in Restaurants: Front of House vs Kitchen
October 2, 2026Read →
Tipping & Math5 min read
Cashless Tipping: Apps, QR Codes, and Digital Gratuity Trends
October 2, 2026Read →
Tipping & Math4 min read
Tipping Ride-Share Drivers: Uber and Lyft Guidelines
October 2, 2026Read →
Text & Productivity6 min read
How Word Counters Work: Algorithmic Text Parsing & Reading Speed Math
October 5, 2026Read →
PDF & Documents6 min read
Client-Side PDF Compression: How to Shrink Documents Without Server Uploads
October 5, 2026Read →
Text & Productivity6 min read
7000 Wörter in Seiten: Wie viele Buch- & Normseiten sind das?
October 7, 2026Read →
Text & Productivity5 min read
PDF Wörter zählen: 4 einfache Methoden ohne teure Software
October 7, 2026Read →
Text & Productivity5 min read
Wörter auf einer Website zählen: URLs & Webseiten richtig analysieren
October 7, 2026Read →
Base64 & Encoding6 min read
Base64 to Image: Complete Conversion, Data URI & Image Decoding Guide
October 7, 2026Read →
Text & Productivity6 min read
Wortzähler Online: Wörter & Zeichen kostenlos im Browser zählen
October 7, 2026Read →
JSON & APIs7 min read
UUID v4 vs. UUID v7: The Developer Guide to Random vs. Time-Ordered Identifiers
October 8, 2026Read →
JSON & APIs6 min read
Unix Timestamps & Epoch Time Explained: Conversion Guide, Parsing & The Year 2038 Problem
October 8, 2026Read →
Base64 & Encoding7 min read
Cryptographic Hash Functions Explained: SHA-256, SHA-512, MD5 & Checksum Verification
October 8, 2026Read →
JSON & APIs8 min read
How to Decode & Inspect JWTs: Complete Guide to Header, Payload, Signature & Security Claims
October 8, 2026Read →
Text & Productivity6 min read
Case Converter Guide: Casing Conventions for Code, Databases, URLs & Editorial Writing
October 8, 2026Read →
Base64 & Encoding7 min read
The Ultimate Guide to Base64 Decoders: Decoding Strings, Binary Files, and Data URIs Safely
October 8, 2026Read →
Text & Productivity7 min read
Online Word Counter Guide: Counting Algorithms, Reading Time Calculations & Optimal Word Counts
October 8, 2026Read →
PDF & Documents7 min read
PDF Optimization & Conversion Guide: How to Shrink, Compress and Convert PDFs Without Losing Quality
October 8, 2026Read →
JSON & APIs7 min read
UUID Generator online: UUID v4 vs. v7, RFC 9562 & B-Tree Indexierung
October 8, 2026Read →
JSON & APIs6 min read
Unix Timestamp Umrechner: Epoch-Zeit in Datum umwandeln, UTC & das Jahr-2038-Problem
October 8, 2026Read →
Base64 & Encoding7 min read
Hash Generator online: SHA-256, SHA-512 & MD5 Prüfsummen berechnen und verifizieren
October 8, 2026Read →
JSON & APIs7 min read
JWT Decoder: JSON Web Tokens sicher im Browser entschlüsseln & Claims prüfen
October 8, 2026Read →
Text & Productivity6 min read
Groß- und Kleinschreibung online umwandeln: camelCase, snake_case & Title Case
October 8, 2026Read →
Base64 & Encoding7 min read
Base64 Decoder online: Texte, Dateien und Data-URIs sicher entschlüsseln
October 8, 2026Read →
PDF & Documents7 min read
PDF verkleinern & optimieren: Dokumente ohne Qualitätsverlust im Browser komprimieren
October 8, 2026Read →
5. About, Privacy & Legal Documents
About Toolstack
Our mission, zero-data architecture, and engineering principles
Open Page
Privacy Policy (GDPR)
100% client-side privacy policy with zero server-side storage
Open Page
Terms of Service
Usage guidelines and terms for free web utilities
Open Page
Contact & Support
Get in touch for questions, bug reports, and suggestions
Open Page