---
title: "Popular Online Tools - JSON, PDF, Password | FindUtils"
description: "Popular FindUtils tools: password generator, QR codes, JSON formatter, and PDF tools. No signup. Runs in your browser."
url: https://findutils.com/popular/
---

# Popular Tools

Hand-picked tools loved by developers, designers, and creators. Browse our top picks or explore by category. The picks are editorial, not a live usage ranking.

## Featured Tools

Our top picks across all categories

- [Password Generator](https://findutils.com/security/password-generator/): Create strong, secure passwords with customizable rules.
- [QR Code Generator](https://findutils.com/generate/qr-code-generator/): Generate QR codes for URLs, text, Wi-Fi, and vCards.
- [JSON Formatter](https://findutils.com/developers/json-formatter/): Validate, format, and minify JSON data instantly.
- [UML Diagram Editor](https://findutils.com/developers/uml-diagram-editor/): Create UML diagrams with a live PlantUML editor. Write code and instantly preview sequence, class, activity, state, and component diagrams.
- [Image Compressor](https://findutils.com/convert/image-compressor/): Reduce image file size without losing quality.
- [PDF Merger](https://findutils.com/pdf/pdf-merger/): Combine multiple PDF files into one document securely.
- [Color Converter](https://findutils.com/design/color-converter/): Convert HEX, RGB, HSL and generate palettes.
- [Base64 Encoder](https://findutils.com/developers/base64-encoder/): Encode and decode text or files to Base64 format.
- [UUID Generator](https://findutils.com/generate/uuid-generator/): Generate unique identifiers (UUID/GUID) instantly.
- [Mind Map Maker](https://findutils.com/productivity/mind-map-maker/): Create beautiful mind maps with drag-and-drop nodes. Brainstorm ideas, organize thoughts, and export your mind maps.
- [ER Diagram Designer](https://findutils.com/developers/er-diagram-designer/): Design entity-relationship diagrams visually. Create database schemas with tables, columns, and relationships.
- [Regex Tester](https://findutils.com/developers/regex-tester/): Test and debug regular expressions with real-time matching.

## Browse by Category

- [Developer Tools](https://findutils.com/developers/): 91 tools
- [Design Tools](https://findutils.com/design/): 25 tools
- [Finance Tools](https://findutils.com/finance/): 32 tools
- [Security Tools](https://findutils.com/security/): 25 tools
- [Converters](https://findutils.com/convert/): 65 tools
- [PDF Tools](https://findutils.com/pdf/): 11 tools
- [Generators](https://findutils.com/generate/): 31 tools
- [Calculators](https://findutils.com/calculate/): 32 tools
- [Text Tools](https://findutils.com/text/): 16 tools
- [Media Tools](https://findutils.com/media/): 27 tools
- [Network Tools](https://findutils.com/network/): 17 tools
- [SEO Tools](https://findutils.com/seo/): 18 tools
- [Education Tools](https://findutils.com/education/): 15 tools
- [Productivity](https://findutils.com/productivity/): 23 tools
- [Mockups](https://findutils.com/mockups/): 9 tools

## Recently Updated

- [RSA Encryption Tool (PEM)](https://findutils.com/security/pgp-encryption-tool/) (Updated 2026-09-27)
- [CSP Header Generator](https://findutils.com/security/csp-header-generator/) (Updated 2026-09-27)
- [Password Hasher (bcrypt / Argon2id)](https://findutils.com/security/password-hasher/) (Updated 2026-09-27)
- [Subtitle Cleaner](https://findutils.com/media/subtitle-cleaner/) (Updated 2026-09-27)
- [Subtitle Overlap Fixer](https://findutils.com/media/subtitle-overlap-fixer/) (Updated 2026-09-27)

## Explore All Tools

Browse the full collection of online tools, organized by category. No sign-up.

[Browse All Tools](https://findutils.com/all-tools/)