Private by design · Offline by default

Base64 and useful browser tools.
Your tool inputs stay on your device.

Encode or decode Base64 instantly, then use 59 more text, developer, generator, converter and image utilities. No uploads, accounts or external libraries.

Open Base64 Browse all 60 tools

100% browser-basedWorks offlineDark & light themesMobile friendly

Browse by category

Jump directly to the type of tool you need.

19 Text tools Count, clean, compare, extract and transform everyday text. 17 Developer tools Format, validate, encode and inspect common development data. 9 Generators Create secure passwords, identifiers, strings and reusable sample data. 12 Converters Convert measurements, dates, numbers, colors and technical values. 3 Image tools Resize and convert images locally without uploading a file.

Popular tools

Base64 first, followed by a compact selection of frequently useful utilities.

View all 60 tools →

Base64 Encoder & Decoder

Encode or decode UTF-8 Base64 with optional encrypted history and JSON backup.

Word & Character Counter

Count words, characters, sentences, paragraphs, lines and reading time live.

JSON Formatter & Validator

Validate, beautify, minify and optionally sort JSON object keys.

Secure Password Generator

Create strong random passwords with length and character-set controls.

Text Case Converter

Switch text between upper, lower, title, sentence, camel, snake and kebab case.

Image Resizer

Resize local images to exact pixel dimensions and export PNG, JPEG or WebP.

SHA Hash Generator

Generate SHA-256, SHA-384, SHA-512 or legacy SHA-1 for text and files.

CSV to JSON Converter

Parse quoted CSV rows and convert headers into JSON object properties.

Percentage Calculator

Calculate a percentage of a value, a ratio percentage or percentage change.

Open the complete tools directory

Your data is not the product

Every conversion runs locally with standard browser APIs. Tool inputs are not transmitted. Optional Google Analytics and Google AdSense load only after user consent, and the downloaded PWA can keep working with no network connection.

Private tools that keep working offline

Offline Tools starts with a complete Unicode-safe Base64 encoder and decoder, then adds focused utilities for text, development data, random values, measurements and images. Each operation runs with JavaScript and standard browser capabilities on the device you control.

Install the Progressive Web App to keep Base64 and the complete directory available during travel, outages or restricted connections. Every utility also has a dedicated URL, explanatory article, dark and light themes, and controls that adapt to phones and desktop screens.