Free Online Developer Tools for Web Developers
10 free browser-based developer tools for encoding, hashing, formatting, and generating data. Password generator, JSON formatter, Base64 encoder, SHA hash generator, QR code generator, UUID generator, and more. No install, no account required.
Strong Password Generator
Generate cryptographically secure passwords up to 64 characters.
IP Address Lookup
Find your public IP address, location, ISP, and ASN.
SHA Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Base64 Encoder and Decoder
Encode text to Base64 or decode any Base64 string.
JSON Formatter and Validator
Format, validate, and minify JSON with syntax highlighting.
QR Code Generator
Generate QR codes for URLs, text, email, phone, or WiFi.
URL Encoder and Decoder
Encode or decode percent-encoded URL strings instantly.
UUID v4 Generator
Generate cryptographically random UUID v4 identifiers.
Text Encryptor
Encrypt and decrypt text with a secret key in your browser.
Test Data Generator
Generate fictional names and addresses for software testing.
10
Developer tools
SHA-512
Max hash strength
SubtleCrypto
Crypto API
0
Data transmitted
Tool reference
| Tool | Category | Privacy | API / Method |
|---|---|---|---|
| Password Generator | Security | Client-only | crypto.getRandomValues() |
| Hash Generator | Security | Client-only | SubtleCrypto |
| Text Encrypt | Security | Client-only | XOR cipher |
| JSON Formatter | Data | Client-only | JSON.parse/stringify |
| Base64 Encoder | Encoding | Client-only | atob / btoa |
| URL Encoder | Encoding | Client-only | encodeURIComponent |
| UUID Generator | Generate | Client-only | crypto.randomUUID() |
| QR Code Generator | Generate | Client-only | qrcode library |
| Test Data Generator | Test Data | Client-only | Random seed |
| IP Address Lookup | Network | External API | ip-api.com |
Online dev utilities for every workflow
Online dev utilities cover a broad range of tasks that developers repeat daily: encoding strings before sending them through a URL, hashing passwords and file checksums for verification, formatting JSON responses from APIs, generating UUIDs for database records, and creating QR codes for links. Each tool handles one task with no configuration: open it, use it, copy the output.
The password generator uses cryptographic randomness, uppercase and lowercase letters, numbers, and symbols up to 64 characters. The UUID v4 generator uses the same cryptographic source. Both run entirely client-side so no generated value is ever transmitted to a server.
Browser-based developer tools: no install required
Browser-based developer tools eliminate dependency management, version conflicts, and installation overhead. Opening a browser tab is faster than launching any desktop tool, and these tools are bookmarkable and usable from any machine including ones where you cannot install software.
Frequently asked questions
All processing runs entirely in your browser. No text, passwords, hashes, or encoded strings are sent to any server. The SHA hash generator uses the browser SubtleCrypto API directly. The Base64 encoder and URL encoder use native browser functions. Nothing you type is logged or stored.
Yes. Every tool on this page runs as a standard webpage in any modern browser. No extension, plugin, desktop app, or account is required. The tools work on Chrome, Firefox, Safari, and Edge on desktop and mobile.
Yes. All developer utility tools on this page are responsive and usable on phone and tablet. Input fields, copy buttons, and output areas adapt to any screen width. The JSON formatter and Base64 tools handle large text inputs on mobile without performance issues.
Yes. Both the password generator and the UUID v4 generator use the browser crypto.getRandomValues() API, which draws entropy from system-level sources. This produces values that pass cryptographic randomness tests and are suitable for production use in authentication and identification systems.