Free online tools to merge PDFs, convert files, format text, and generate QR codes
Merge PDF files, convert files, format text or JSON, and generate QR codes quickly with free online tools that run in your browser.
Free online tools to fix, convert, and create
ToolCircuit is a collection of free online tools that help you convert files, format text or code, generate assets, and handle everyday tasks without installs or signups. Everything runs in your browser for speed and privacy. Use the JSON formatter tool when you need to format JSON online, the QR code generator to generate QR codes free, the PDF merge tool to merge PDF online free, the barcode generator, or cURL to code converter without installing anything.
Jump between PDF merging, barcode and QR generation, JSON or HTML formatting, quick math and date calculators, or social post mockups. Try the HTML formatter,favicon generator,meta tag generator, or text diff checker to get quick results, or use the PDF to image converter and image to PDF converter as part of your convert files online free workflow. Edit documents, format code, convert images, and generate assets across PDF tools, image tools, text tools, and developer tools.
Start with a goal
Pick the job and go.
PDF merge, split, compress, and image-to-PDF without uploads when possible.
QR, barcodes, favicons, and OpenGraph meta in one spot.
Case/slug converters, JSON/HTML formatting, regex testing — no bloat.
Text and JSON diffing with instant highlights.
EMI, BMI/BMR, discounts, dates, and time zones — all in-browser.
Instagram, TikTok, X, Facebook, LinkedIn previews — ready to export.
Browse top categories
Open the fastest, most-used collections of free online tools.
- JSON Formatter & Validator tool
- JSON Diff tool
- JSON / YAML / XML Converter tool
- Meta & OpenGraph Generator tool
- Canonical URL Checker tool
- Content Gap Finder tool
- QR Code Generator tool
- Decision Wheel (Spin Wheel) tool
- BMI Calculator tool
- Percentage Calculator tool
- Average Calculator tool
- Ratio Calculator tool
- Carousel Post Generator tool
- Viral Hook Generator tool
- Hashtag Generator tool
- Text to Table Converter tool
- Find & Replace Text tool
- Word Counter tool
Most used tools this week
- QR Code Generator →Trusted for quick fixes.
- PDF Merge →Trusted for quick fixes.
- JSON Formatter & Validator →Trusted for quick fixes.
- Cron Expression Generator →Trusted for quick fixes.
- Barcode Generator →Trusted for quick fixes.
- Case & Slug Converter →Trusted for quick fixes.
Recently updated tools
- Instagram Post Generator →Updated today.
- TikTok Post Generator →Fresh improvements.
- Facebook Post Generator →Fresh improvements.
- LinkedIn Post Generator →Fresh improvements.
- X Post Generator →Fresh improvements.
Why people trust ToolCircuit
- Browser-first: most tools run locally; uploads are labeled only when needed.
- No walls: no signup, no installs — open and use instantly.
- Fast and light: lean pages tuned for repeat use on mobile and desktop.
- Active roadmap: new tools and improvements ship weekly.
Online tools for everyday tasks
Browse free online tools to convert files, format text and code, generate QR/barcodes, create social mockups, and handle quick calculations. Everything runs in your browser for speed, privacy, and zero-install convenience. Use the JSON diff tool,PDF compressor,discount calculator,time zone converter, and case converter tool as quick starting points. These are some of the best free online tools when you need an easy file converter online, a fast JSON formatter, a simple QR generator, or lightweight PDF tools alongside image tools, text tools, and developer tools for editing documents, formatting code, converting images, and generating assets.
FAQ
- How can I merge PDF files online for free? Use our browser-based PDF merge tool with no signup, then save or share.
- Is there a free JSON formatter online? Yes, the JSON formatter tool formats and validates JSON instantly in your browser.
- Can I generate a QR code without signing up? Yes, the QR code generator is free, in-browser, and exports quickly.
- How to convert files online quickly? Use converters like image to PDF, PDF to image, or other file converter tools with no installs.
Ready to find your tool?
Search a task or start with a goal — you’ll land on the right free online tool without scrolling.