Text Utilities13 tools Calculators21 tools Validators & Checkers7 tools Data Organizers4 tools
Category · Utility Tools

Best free Converters Tools you can use right now

Converters here take CSV into JSON, PDF into editable text and Markdown into HTML, while the unit ones sort out inches, kilos and degrees.

Popular tags: Converter JSON Format PDF Text CSV Markdown
14 Free Tools
100% Free Forever
1,405+ Tools Sitewide
Aug 18, 2026 Last Updated
AI Directory Companies Comparisons Alternatives Best-of Guides Use Cases Collections AI Tools AI Models AI Courses
14 tools found
Updating…
Sort tools by
Top Picks for You The tools our community reaches for most.

AI Unit Converter

Converters

Convert length, weight, volume, speed and more with this free AI unit converte...

Unit Converter
Use Tool
Explore by category

Browse More Utility Tools

Every free tool on AIToolsay, sorted by the job it actually does.

View all tools

Text Utilities

Paste a paragraph and the text utilities here will summarize it, rewrite it, count the words, fix th...

13 tools

Calculators

No spreadsheet needed for a quick sum. The calculators cover percentages, discounts, tax, loan repay...

21 tools

Validators & Checkers

Bad data hides in plain sight until something breaks. Validators and checkers test emails, URLs, dom...

7 tools

Data Organizers

Rows in the wrong order, notes with no structure, a stock list nobody can read. Data organizers turn...

4 tools

Data Analysis

Numbers on their own do not say much. Data analysis here finds the pattern, compares two sets, measu...

1 tool

Extractors

The part you need is buried on page nine. Extractors pull the keywords, names, dates, tables and pla...

5 tools

Developer Utilities

A minified JSON blob or a long SQL query comes back readable. Developer utilities also clean data, s...

12 tools
The free toolbox, explained

Why use AIToolsay Tools?

A working toolbox rather than a shop window — every tool runs here, in the browser, the moment you open it.

OUR PROMISE

Free Forever

Every tool on this page is 100% free — no signup wall, no trial clock, no credit card.

Organised by Job

Grouped by what each tool actually does, so "write my blog post" lands on the right one first.

Private by Design

Your text is processed for the result you asked for. Nothing is published and nothing is sold.

Fast & Simple

Paste, click, done. Every tool is one screen with no setup and nothing to learn.

No Registration

Open a tool and start typing. No account, no email, no password to remember.

Always Improving

New tools ship every week and the existing ones are retuned as the models get better.

Questions

Everything you wanted to ask

Quick answers about the tools in this category — what they cost, what they need and how they work.

Still have a question? We usually reply within one working day. Report Issues A broken tool or a missing page? Tell us. Submit your AI tool Add your AI tool to our directory.

Which formats can I move between?
The set covers the pairs people ask for most, such as CSV and JSON, JSON back to CSV, XML into JSON, YAML into JSON, Markdown into HTML and HTML back into Markdown. Text into PDF and PDF into text sit here too.

Can I convert a PDF into editable text?
Yes. The AI PDF To Text Converter pulls the wording out of a PDF and hands it back as plain text you can edit, search or paste elsewhere. The AI Text To PDF Converter makes the same trip in the other direction.

Do these handle units as well as files?
They do. The AI Unit Converter and the AI Measurement Converter cover length, weight, volume, temperature and the other everyday swaps, so you are not opening a second page when a recipe or a spec sheet uses units you do not think in.

Will my CSV keep its column names?
The AI CSV To JSON Converter reads your header row and uses those names as keys, so what comes back mirrors the file you started with. Going the other way, the AI JSON To CSV Converter rebuilds a header from the keys it finds.

Is there a cost or a trial?
No. Every converter is free with no cost and no trial, and no account or sign up is needed since they run as guest tools in the browser. Signing in is optional and only saves your history.

How do I save what comes out?
Results export in TXT, DOC and HTML with one click, so a converted file can go straight into your project folder. Everything works on phones, tablets and desktops with nothing at all to install first.

Does Markdown formatting survive the trip to HTML?
The AI Markdown To HTML Converter keeps headings, lists, links, bold text and code blocks in place. The AI HTML To Markdown Converter reverses it and drops the wrapper tags, which helps when a live page needs to become a clean draft again.
Still have a question? We usually reply within one working day. Report Issues A broken tool or a missing page? Tell us. Submit your AI tool Add your AI tool to our directory.