Free tools that never leave your browser
Format JSON, generate passwords, resize images, and ship SEO tags — privately. Toolio runs on-device. No uploads. No account.
Most used
Popular tools
The utilities people open first — all free, all local.
JSON Formatter
Developer Tools
Pretty-print messy JSON with stable indentation so nested objects and arrays are easy to scan.
248k uses
Password Generator
Productivity Tools
Create strong random passwords in the browser so candidates never travel through a remote API.
236k uses
Word Counter
Text Tools
Count words in essays, briefs, and captions so drafts stay inside the limit you actually need.
222k uses
QR Code Generator
Image Tools
Turn text or a URL into a QR code you can download, without sending the payload to a printer API.
210k uses
UUID Generator
Developer Tools
Create RFC-style UUIDs in the browser for database IDs, test fixtures, and idempotency keys.
198k uses
Hash Generator
Developer Tools
Hash text locally with common digest algorithms to compare checksums and fingerprint strings.
188k uses
Percentage Calculator
Calculators
Solve percent of, percent change, and reverse percentages for grades, markups, and reports.
182k uses
Character Counter
Text Tools
Measure characters with and without spaces for bios, ads, SMS drafts, and strict form fields.
177k uses
Just shipped
Newly added tools
Fresh utilities added to the catalog.
Placeholder Image Generator
NewImage Tools
Create labeled placeholder images at a chosen size so mockups can ship before final art arrives.
38k uses
Dummy JSON Generator
NewGenerators
Produce sample JSON records for mock APIs so front-end work can proceed before a backend exists.
41k uses
Wi-Fi QR Generator
NewGenerators
Encode a Wi-Fi network name and password into a QR code guests can scan without typing either.
36k uses
Bulk UUID Generator
NewGenerators
Mint many UUIDs at once for seed data, CSV identifier columns, and load-test record keys.
30k uses
Initials Avatar Generator
NewGenerators
Draw a simple initials avatar from a name and color so mock user lists look finished in reviews.
22k uses
YAML to JSON
NewConverters
Parse YAML into JSON so APIs and formatters can consume configs that started as indented files.
28k uses
Directory
Browse by category
Pick a lane — developer, writing, SEO, images, math, and more.
Developer Tools
Format, encode, decode, and debug payloads without leaving your browser.
20 tools · Featured: JSON Formatter
Text Tools
Count, clean, convert, and reshape copy for writing and editorial work.
18 tools · Featured: Word Counter
SEO Tools
Build meta tags, sitemaps, robots files, and campaign URLs in seconds.
12 tools · Featured: Meta Tag Generator
Image Tools
Resize, convert, pick colors, and generate QR codes on-device.
12 tools · Featured: QR Code Generator
Productivity Tools
Passwords, lorem copy, CSS snippets, and everyday desk utilities.
12 tools · Featured: Password Generator
Calculators
Quick math for finance, health, time, and everyday decisions.
14 tools · Featured: Age Calculator
Generators
Create identifiers, dummy data, QR codes, and random values instantly.
12 tools · Featured: Random Number Generator
Converters
Move data between encodings, formats, and number systems locally.
14 tools · Featured: Base64 Encode
Why Toolio
A toolbox you can actually trust
Built for drafts, configs, and photos you would rather not drop into an unknown upload form.
Privacy first
Inputs stay in the current tab. We do not collect the files or text you process.
Browser based
Formatting, hashing, and image work run with Web APIs — no install, no queue.
No signup required
Open a tool and start. There is no account wall between you and the result.
Lightning fast
Results appear as soon as your device can compute them. No upload wait.
Mobile friendly
The same utilities work on phones and tablets with a layout that stays usable.
SEO optimized
Every tool page ships with unique metadata, canonical URLs, and structured data.
Curated
Collections
Hand-picked lists for daily work, launches, writing, and search.
Daily drivers
The utilities people open most: format JSON, mint a password, count words, or encode a URL without leaving the tab.
12 tools →
Just shipped
Recently added generators and converters — placeholders, dummy JSON, Wi-Fi QR codes, bulk UUIDs, and YAML helpers.
6 tools →
Developer bench
A compact bench for payloads: JSON, JWTs, hashes, regex, cron, diffs, Base64, and Unix time — all processed locally.
10 tools →
Writing desk
Editorial helpers for drafts, headings, and Markdown — counts, slugs, case, filler copy, and table scaffolding.
8 tools →
Guides
Latest from the desk
Practical walkthroughs for JSON, passwords, SEO tags, and private processing.
Guides
Regular expressions without the panic
Test patterns locally, read what your engine actually matches, and keep sample data off someone else’s server.
Nico Vale · Aug 12, 2026 · 8 min
Guides
Password entropy without the jargon
A practical guide to generating strong passwords in the browser — length, character sets, and what “random” actually has to mean.
Maya Okonkwo · Aug 5, 2026 · 8 min
Guides
Meta tags that still matter in 2026
Title, description, Open Graph, and SERP previews remain the cheapest way to control how a page looks in search and social. Here is what to ship.
Nico Vale · Jul 28, 2026 · 8 min
FAQ
Frequently asked questions
Short answers about privacy, cost, and what Toolio is for.
Full catalog
Explore 114+ tools across eight categories
Filter, search, and jump straight into a workspace. Everything listed runs in the browser.
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