78 free tools
Everything you need. One place.
Discover powerful free online tools for PDFs, images, text, calculations, development and everyday tasks — processed on your device, with no sign-up and no limits.
Popular tools
Most-needed jobs, one click away
Merge PDF
Combine PDF files into one, in the order you choose.
PDF toolsSplit PDF
Extract pages or split a PDF into several files by range or every N pages.
PDF toolsCompress PDF
Shrink PDFs with photos or scans by re-compressing their images. Text stays sharp.
PDF toolsJPG to PDF
Turn photos and scans (JPG, PNG, WebP) into one PDF, one image per page.
PDF toolsPDF to JPG
Convert PDF pages to JPG or PNG images at the resolution you need.
PDF toolsCompress Image
Shrink JPG, PNG and WebP images, or hit an exact size like 100 KB or 1 MB.
Image toolsResize Image
Resize by pixels or percent, keep proportions, or fit social media sizes.
Image toolsWord Counter
Count words, characters, sentences and reading time as you type.
Text toolsText Compare
Compare two texts and highlight every addition, deletion and change.
Text toolsJSON Formatter & Validator
Format, validate and minify JSON, with exact error lines and fix hints.
Developer toolsJWT Decoder
Decode a JSON Web Token locally and verify its signature with your key.
Developer toolsContrast Checker
Check text and background colours against WCAG 2.2 AA and AAA.
Design & color
Browse by category
9 categories, from PDF editing to home-improvement estimates.
PDF tools 11 tools
Combine, split, shrink and tidy PDF documents without sending them anywhere.
Image tools 6 tools
Shrink photos for upload limits, resize for social media, convert formats and crop.
Text tools 8 tools
Everyday text clean-up for writers, students, marketers and anyone working with lists.
Developer tools 15 tools
Formatters, converters, encoders and generators for daily development work.
Design & color 4 tools
Small, exact tools for designers and front-end developers: color conversion, accessibility contrast checks, palettes from images and favicon sets ready for any site.
SEO & marketing 6 tools
Tools for getting pages found and links tracked: meta tags with a search-result preview, campaign URLs, robots.txt rules, clean slugs, and static QR codes and barcodes that never expire.
Privacy & security 4 tools
Practical privacy tools that never send your data anywhere: strong random passwords, honest strength checks, metadata removal from photos and a safe QR code checker.
Calculators & converters 10 tools
Everyday math with the method shown: loans and EMIs with full amortization, compound growth, VAT and margins in any currency, dates, ages, units and time zones.
Home & DIY calculators 14 tools
Know how much to buy before you start the job.
Why Toolgix
What you can count on in every tool.
Your files never leave your device
Tools run inside this page. Turn your connection off after it loads: they keep working.
No limits, no sign-up
No daily caps, file counts or watermarks. Your device memory is the only limit.
Honest results
Every tool shows what changed, and every page explains its method and its limits.
Built for everyone
Keyboard and screen-reader friendly, works on phones, light and dark themes.
Guides
Practical, sourced how-tos — each linked to a tool.
- developers
Base64 and Data URLs: When to Inline Images (and When Not)
What Base64 is, why it makes data about 33% bigger, how data URLs work in HTML and CSS, and when inlining an image speeds a page up or slows it down.
Read the guide - privacy
How to Check if an Online Tool Uploads Your Files
A 2-minute test with your browser’s developer tools shows whether a PDF or image tool sends your file to a server. Step by step, for Chrome, Edge, Firefox and Safari.
Read the guide - design
Colour Contrast Ratios Explained: WCAG 4.5:1 and 3:1
What a contrast ratio is, which ratios WCAG 2.2 requires for text, large text and interface elements, and how to fix colours that fail without changing your brand.
Read the guide - developers
Common JSON Errors and How to Fix Them
Trailing commas, single quotes, comments, NaN and unescaped line breaks: the JSON mistakes that break parsers, why they are invalid, and how to fix each one.
Read the guide - images
How to Compress an Image to 100 KB, 1 MB or Any Size
Upload forms often demand images under 100 KB or 2 MB. How JPEG quality and pixel size affect file size, and the fastest way to hit a limit without ruining the photo.
Read the guide - developers
How to Decode a JWT Safely: Decoding Isn’t Verifying
What is inside a JSON Web Token, how to read its header and claims, what “exp” and “iat” mean, and why pasting production tokens into random websites is a risk.
Read the guide
Frequently asked questions
Is Toolgix really free?
Yes. All tools are free to use without an account, a trial or a subscription. There are no daily limits, file-count limits or watermarks.
Are my files uploaded to a server?
No. PDF, image and text tools run inside the page in your browser: your files are read from your device, processed in memory and saved with a normal download. Our browser tests fail if a tool sends anything other than requests for its own code. The privacy page shows how to check this yourself.
Do the tools work on a phone or tablet?
Yes. Every tool works in a current mobile browser. Very large files (for example a 500-page PDF) can be slow or run out of memory on older phones, because the work happens on your device.
Can I process many files or values at once?
Many tools have batch options: merge, compress or convert several PDFs and images in one go, generate many QR codes or hashes from a list, or convert a whole column of values. Batch results download together as a ZIP or a CSV file.
Does Toolgix remember what I do?
Toolgix keeps your theme, your recently used tools, favourites and recent searches in your own browser (local storage) so they are there next time. Nothing you type or open is sent to us. Clearing your browser data removes them.
How accurate are the calculators?
Each calculator page shows its formula, a worked example and its limits, and every tool has automated tests with independent expected values. Results are estimates for planning: check important figures (loans, tax, building materials) with a professional before you rely on them.