Image Compressor
Reduce image file size without losing quality
Open toolFree online tools.
Less busywork.
Fix a file. Find a number. Clean up a little chaos.
Useful tools that get you back to what matters.
The daily kit
A few good tools.
A lot less friction.
Ready when you need them. No signup.
What are you working on?
Markdown
Tables, navigation, links, and document metadata.
Text
Count, clean, compare, and reshape your words.
Images
Smaller files. The right size. A different format.
PDFs
Put your documents in order.
Developer
Make sense of code, data, and debugging.
Calculators
Work out the numbers, without the spreadsheet.
Converters
From one unit, base, or time zone to another.
Generators
A starting point, a secure password, a QR code.
SEO & writing
Polish the details before you publish.
AI utilities
Tokens, context, cost, and configuration.
Work & money
Plan a project, prepare an invoice, check a budget.
Small tasks. Sorted.
PDF Merge
Combine multiple PDFs into one document
Open toolWord Counter
Count words, characters, and more
Open toolJSON Diff & Compare
Compare JSON files, arrays and API responses
Open toolPassword Generator
Generate secure random passwords
Open toolImage Resizer
Resize a photo to the dimensions you need
Open toolYou have things to do.
Your tools should help.
No accounts to create. No files to hand over. Just practical utilities, made to do one thing well and let you move on.
A little about UtilZillaBefore you get
back to it.
Something else? Say hello ↗Frequently Asked Questions
UtilZilla is a free collection of 111+ utility tools — calculators, converters, text tools, developer tools, AI/LLM tools, SEO tools, and generators. No signup is required. Most tools run locally; server tools explain their requests before you run them.
Yes, every tool on UtilZilla is completely free, with no paywall, usage limit, or premium tier.
No. Every tool works immediately with no signup, login, or email required.
Most file and text tools process inputs in your browser. Catalog Check, Ledger Match, Contract Review, Index Check and Overlap Planner send inputs to UtilZilla on Vercel only when you run a check. Public-data tools explain their provider requests. See the privacy policy, and do not submit secrets or payment-card data.
Text tools, calculators, unit converters, image and PDF tools, developer tools (JSON formatter, hash generator, UUID generator, and more), AI/LLM tools (token counter, API cost calculator, JSON Schema validator), SEO tools, and generators.
Yes — the AI Tools category includes a Token Counter (exact tiktoken counts for GPT models), an AI API Cost Calculator, a Context Window Calculator, a JSON Schema Validator for LLM structured output, an llms.txt Generator, and an Embedding Cosine Similarity Calculator.