Free developer and utility tools
Format JSON, convert to CSV, encode Base64, generate QR codes and clean metadata — all without your data leaving the tab.
These are the small jobs that come up constantly and are annoying to install anything for: pretty-printing a blob of JSON, turning an array into a spreadsheet, encoding a string, making a QR code, or checking what data is hiding in a file you are about to send someone.
They are also the jobs where pasting into a random website is the worst habit in software. API responses contain tokens, CSVs contain customer records, and QR codes often encode Wi-Fi passwords. Every tool here runs entirely in the browser, so there is no request to intercept and no log on a server somewhere.
Working with images rather than data? See the image tools.
Developer & Utility tools
JSON Formatter
Format, validate and minify JSON free, with precise error locations. Runs in your browser, so your data is never sent to a server. No signup, no size limit.
Password Generator
Generate strong random passwords free using your browser's cryptographic RNG. Nothing is transmitted or stored. No signup, no tracking, no length limit.
QR Code Generator
Create QR codes for links, text and Wi-Fi free. Set error correction, colours and size, then download PNG or SVG. Runs in your browser, nothing is uploaded.
Word Counter
Count words, characters, sentences and paragraphs as you type, with reading and speaking time. Runs in your browser, so your text is never uploaded. Free.
Base64 Encoder
Encode text to Base64 or decode it back, with an optional URL-safe alphabet. Runs in your browser, so your data is never sent anywhere. Free, no signup.
Metadata Remover
Strip EXIF, GPS location, camera and timestamp data from photos and PDFs. Runs in your browser, so your files are never uploaded. Free, no signup.
JSON & CSV Converter
Convert JSON arrays to CSV and CSV back to JSON free, handling quoted fields and embedded commas. Runs in your browser, your data is never uploaded. No signup.
XLSX Viewer
Open .xlsx and .xlsm workbooks, switch between every sheet, search the rows and export the sheet you need as CSV. Your file stays on your device.
Remove GPS from Photo
Strip GPS coordinates, location tags and EXIF camera data from photos free in your browser before sharing. Protect your privacy. Fast, local, no signup.
View EXIF Metadata
View camera metadata, lens details, exposure settings and GPS tags from photos online free. Inspect EXIF data for JPG, PNG, WebP and HEIC. 100% private.
Encrypt File
Encrypt any file with a password directly in your browser using AES-256-GCM. Free, client-side, zero upload. Lock PDF, images, or documents securely.
Decrypt File
Decrypt and unlock .fz encrypted files directly in your browser. Free, 100% private, client-side AES-256-GCM decryption with zero server uploads.
Percentage Calculator
Calculate percentages instantly: what is X% of Y, percentage change, and reverse percentages. Free online percentage calculator with step-by-step working.
Age Calculator
Calculate your exact age in years, months, days, hours, and total days. Accurate birthday countdown and leap-year safe online age calculator.
SHA-256 Hash Generator
Generate cryptographic SHA-256 and MD5 checksums for text strings and local files directly in your browser. 100% client-side, zero upload hash tool.
Which developer & utility tool do I need?
Find the job you are trying to do and use the tool that does it.
| What you are trying to do | Use this tool |
|---|---|
| Format or validate a JSON blob | JSON Formatter |
| Move data between JSON and a spreadsheet | JSON to CSV |
| Encode or decode text in Base64 | Base64 Encoder |
| Make a scannable QR code | QR Code Generator |
| Generate a strong random password | Password Generator |
| Count words and characters in a draft | Word Counter |
| Strip hidden metadata before sharing a file | Metadata Remover |
Popular developer & utility conversions
- Convert a JSON array to a CSV spreadsheet
- Convert CSV rows back into JSON
- Encode a string as URL-safe Base64
- Generate a QR code for a Wi-Fi network
- Strip EXIF and GPS data from a photo
Questions
Is my data sent to a server?
No. Everything runs in the browser tab. Your JSON, CSV, strings and generated values never leave your device.
Is there a size limit on what I can paste?
The only constraint is your browser's memory. Very large documents will be slower to process but there is no fixed cap.
Does the password generator use a secure random source?
Yes. It uses the browser's cryptographic random number generator, which is the same source the platform uses for its own security primitives.
Are these tools free?
Yes — free to use with no signup and no daily limit.