Build faster with
free browser tools.
Format, convert, analyze, and generate — everything you need, running locally in your browser. No sign-up, no server, no limits.
Popular Tools
Commonly used developer tools for quick day-to-day workflows.
JSON Formatter
Format, validate, and minify JSON directly in your browser.
JWT Decoder
Decode JWT tokens to inspect header, payload, and signature contents in the browser.
Base64 Encoder
Encode plain text into Base64 directly in your browser.
QR Code Generator
Generate QR codes from any URL or text with custom colors, sizes, and error correction levels.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words for design and development.
Text Diff Checker
Compare two blocks of text line by line and highlight every addition, deletion, and unchanged line.
API & DevOps
Convert between cURL, fetch, and Axios for API workflows.
cURL to Axios Converter
Convert cURL commands into Axios request code for JavaScript and TypeScript projects.
cURL to Fetch Converter
Convert cURL commands into JavaScript fetch code for browser and Node.js workflows.
Fetch to Axios Converter
Convert JavaScript fetch requests into Axios request code for migration and API workflows.
Fetch to cURL Converter
Convert JavaScript fetch requests into cURL commands for API testing and terminal workflows.
Converters
Translate between encodings, formats, and API client styles.
Base64 Decoder
Decode Base64 strings into plain text directly in your browser.
Color Converter
Convert colors between HEX, RGB, and HSL formats instantly. Paste any color format and get all three conversions with a live preview.
CSV to JSON Converter
Convert CSV data to a JSON array of objects with automatic type inference for numbers and booleans.
Image to Base64
Convert any image to a Base64 string or data URI instantly in your browser. Supports PNG, JPG, GIF, WebP, and SVG. No upload required.
JSON to CSV Converter
Convert JSON arrays and objects to CSV format with custom delimiters and header control.
Slug Generator
Convert any text into clean, URL-friendly slugs with hyphen or underscore separators.
Text Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, and more in one click.
Timestamp Converter
Convert between Unix timestamps and human-readable dates with timezone support.
URL Decoder
Decode percent-encoded URL text back into readable content.
URL Encoder
Encode text into percent-encoded URL format for safe use in query strings and paths.
YAML to JSON Converter
Convert YAML to JSON and JSON to YAML instantly in your browser. Supports multi-document YAML and pretty-printed output.
Formatters
Clean up and prettify JSON, SQL, and other code formats.
Generators
Generate UUIDs and other random or derived values.
Color Palette Generator
Generate monochromatic, complementary, analogous, triadic, and tetradic color palettes from any base color.
CSS Box Shadow Generator
Build CSS box shadows visually with live preview. Control offset, blur, spread, color, opacity, and inset. Stack multiple layers.
CSS Gradient Generator
Generate linear, radial, and conic CSS gradients visually with custom color stops, angles, and live preview.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text instantly in your browser.
Password Generator
Generate secure, random passwords with custom length, character sets, and strength indicators.
UUID Generator
Generate RFC 4122 compliant UUIDs (version 4) for use in applications and databases.
Utilities
Handy utilities for everyday developer workflows.
chmod Calculator
Calculate Unix file permissions visually. Toggle read, write, and execute for owner, group, and others to get the octal value and chmod command.
Cron Expression Parser
Parse, validate, and explain cron expressions with human-readable descriptions and upcoming run times.
Markdown Preview
Write and preview Markdown live in the browser with GitHub Flavored Markdown support.
Word Counter
Count words, characters, sentences, and paragraphs with live reading time estimation.
Validators
Test patterns, decode tokens, and inspect structured data.
Why us
Why Tooltify360?
Built for developers who value speed, privacy, and zero friction.
Private by design
Every tool runs locally in your browser. Your data never leaves your device.
Instant results
No uploads, no waiting. Everything processes as you type, right on the page.
Free forever
Every tool is completely free, with no usage limits or hidden paywalls.
No sign-up
Open a tool and start using it immediately. No account, no install required.
Get started
How it works
Three steps — no setup, no sign-up, nothing to install.
Pick a tool
Search by name or keyword, or browse the formatters, converters, generators, and utilities grouped by category above.
Paste your data
Drop in your JSON, token, text, or code. It stays on your device — nothing is uploaded to a server.
Get instant results
Formatting, conversion, and validation happen live as you type. Copy the output with one click.
Ready to build faster?
Jump into any tool — it runs instantly in your browser, free and private.
FAQ
Frequently asked questions
Everything you need to know about using Tooltify360.
Are these online developer tools free to use?
Yes. Every tool on Tooltify360 is completely free — there are no paid tiers, trials, or usage caps. Format JSON, decode JWT tokens, encode Base64, and generate UUIDs as often as your workflow needs.
Where is my data processed?
Entirely on your own machine. Each tool runs client-side in your browser, so whatever you paste or type is never uploaded to or stored on a server. That makes it safe to use with API responses, access tokens, and config files.
Do I need to sign up or install anything?
Never. There is no registration, email wall, download, or install step — open any tool and it is ready to use right away in your web browser.
Can I use these developer tools on a phone or tablet?
Yes. The interface adapts to any screen size, and every tool behaves the same on mobile as it does on the desktop.
What kinds of tools does Tooltify360 include?
Formatters (JSON, SQL, XML), converters (Base64, timestamp, colour, CSV/JSON, YAML, cURL/fetch/Axios), generators (UUID, hash, password, QR code, CSS gradients), validators such as a regex tester and JWT decoder, and everyday developer utilities — with new tools added regularly.
Is it safe to paste sensitive data like tokens or API keys?
Yes. Because every tool is 100% client-side, your JSON, JWT tokens, and credentials are processed locally in your browser and never transmitted, making it safe for API responses and private configuration files.
Do the tools work offline?
For the most part, yes. Once a tool page has loaded, its processing runs locally in your browser, so a dropped connection will not interrupt it.
Free online developer tools that run in your browser
Tooltify360 is a free collection of online developer tools that run entirely in your web browser. Instead of juggling a dozen different websites, installing command-line utilities, or pasting sensitive data into random converters, you get a single, fast, privacy-first toolbox for the tasks developers repeat all day — formatting JSON, decoding JWT tokens, encoding and decoding Base64, converting timestamps, testing regular expressions, and generating UUIDs, hashes, and secure passwords.
Every tool is 100% client-side. When you paste JSON into the formatter or a token into the JWT decoder, that data never leaves your device — there is no server round-trip and nothing is logged. That makes Tooltify360 safe to use with API responses, access tokens, configuration files, and other data you would not want to send to a third party.
Popular developer tools
- JSON Formatter & Validator — pretty-print, minify, and validate API responses and config files while you debug.
- JWT Decoder — inspect the header, payload, and claims of a JSON Web Token without exposing it to a server.
- Base64 Encoder and Decoder — convert text, credentials, and data URIs to and from Base64 in a click.
- Regex Tester — build and debug regular expressions with live match highlighting.
- SQL Formatter — turn a dense one-line query into readable, indented SQL.
- UUID, hash, and password generators — create RFC-4122 UUIDs, MD5/SHA hashes, and strong random passwords.
Convert between cURL, fetch, and Axios
Moving an API request between your terminal and your codebase is tedious by hand. Use the cURL to fetch converter, cURL to Axios converter, fetch to cURL converter, or fetch to Axios converter to translate headers, methods, and JSON bodies automatically.
Everyday utilities
Work out file permissions with the chmod calculator, make sense of a schedule with the cron expression parser, compare two revisions with the text diff checker, or convert data with the CSV to JSON and YAML to JSON converters.
Who these tools are for
Front-end and back-end developers, DevOps and API engineers, QA testers, technical writers, and computer science students all reach for the same small set of utilities dozens of times a day. Tooltify360 keeps them in one place, works identically on desktop and mobile, and never asks you to sign up or pay. New tools are added regularly — browse the full collection on the tools page or read more about the project.