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Format JSON, generate secure passwords, count text, calculate percentages, resize images, prepare PDFs, and discover 433+ free tools in one place.
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Why use 100 Free Online Tools
Find focused utilities for developer tasks, writing, images, PDFs, SEO, design, dates, security, and everyday calculations.
Open a tool, paste your input, and get a clean result without extra steps.
Many everyday utilities process your input directly in the browser.
Use the core tools instantly, whether you need one quick result or a full workflow.
Tool guides explain common use cases, safe habits, and related next steps.
Popular workflows
The catalog is organized around real daily tasks so users can move from intent to output quickly.
Clean an API response
Format, validate, sort, and convert JSON for cleaner debugging and sharing.
Prepare web images
Resize, compress, convert PNG/JPG/WebP, and create exact assets for publishing.
Handle PDF tasks
Merge, split, compress, inspect, and convert documents with practical PDF tools.
Launch an SEO page
Generate metadata, canonical tags, robots rules, hreflang tags, and structured data.
Create secure values
Generate passwords, passphrases, UUIDs, API keys, hashes, and temporary codes.
Polish publishing copy
Count, clean, reverse, compare, and structure text before it reaches your CMS.
Popular tools
Practical tools for developers, writers, creators, marketers, designers, and everyday web users.
Categories
Jump straight into the type of task you need: code, text, images, PDFs, SEO, design, security, dates, or calculators.
Format, validate, convert, and inspect code or structured data.
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Transform URLs, text, tokens, tables, and common data formats.
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Count, clean, convert, compare, and shape written content.
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Simple calculators for percentages, age, money, units, and planning.
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Generate secure values and inspect privacy-sensitive strings.
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Prepare images for websites, products, documents, and social media.
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Plan metadata, previews, campaigns, and search-friendly pages.
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Create palettes, spacing, contrast, CSS values, and UI helpers.
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Compare dates, convert timestamps, and plan across time zones.
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Convert images to PDF, inspect PDF files, and prepare document assets.
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Recently added
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Blog
Read practical guides for JSON, images, PDFs, SEO, security, design, writing, and everyday productivity.
Developer · 6 min
A practical JSON workflow covering formatting, validation, sorting, path extraction, and TypeScript interface generation.
Images · 6 min
How to choose the right image format for web pages, social posts, product images, and documents.
Documents · 6 min
A practical PDF workflow for combining documents, extracting pages, reducing file size, and checking final output.
SEO · 6 min
A simple checklist for metadata, canonical URLs, robots rules, social previews, schema, and internal links.
Security · 5 min
When to use random passwords, readable passphrases, UUIDs, API keys, and one-time codes.
Text · 5 min
How word counters, character counters, summaries, line tools, and Markdown helpers improve publishing workflows.
Productivity · 4 min
A practical guide to using focused web tools for text, code, images, PDFs, and calculations.
Images · 5 min
A practical guide to resizing, compressing, converting, cropping, and preparing image assets for the web.
Documents · 5 min
When to merge, split, compress, inspect, convert, and prepare PDFs without opening heavy software.