Developer hub
Free Online Developer Tools
27 developer utilities — JSON formatter, Base64, Regex tester, JWT decoder, hash generator, and more. Most text tools process data locally. IP lookup contacts an external service; read the tool’s processing note.
- table_chart
JSON to Excel
Flatten JSON into a spreadsheet-friendly grid.
- table_view
Excel to JSON
Upload a sheet and get structured JSON.
- data_object
CSV to JSON
Parse delimiter-separated data to JSON arrays.
- view_column
JSON to CSV
Export arrays of objects as CSV.
- article
Text to PDF
Turn notes, logs, and scripts into a clean PDF.
- code
Base64 encode / decode
Encode or decode text and small payloads.
- content_copy
Remove duplicate lines
Deduplicate sorted or unsorted line lists.
- subject
Lorem ipsum generator
Generate placeholder paragraphs for mockups and layouts.
- schedule
Epoch time converter
Convert Unix timestamps to readable dates and back.
- sync_alt
JSON ↔ XML converter
Convert JSON objects to XML and simple XML to JSON.
- qr_code_2
QR code generator
Encode URLs or text as a downloadable PNG QR code.
- call_split
Split CSV
Split a large CSV into smaller files by row count (ZIP).
- data_object
JSON Formatter & Validator
Format, minify, and validate JSON with syntax highlighting and error detection.
- code
Base64 Encoder / Decoder
Encode and decode text, URLs, and files to and from Base64 format.
- link
URL Encoder / Decoder
Encode special characters in URLs and decode percent-encoded strings.
- search
Regex Tester
Test regular expressions against input strings with match highlighting and group capture.
- schedule
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates in any timezone.
- fingerprint
UUID Generator
Generate random UUID v4 identifiers in bulk with copy-to-clipboard.
- palette
Color Code Converter
Convert colour codes between HEX, RGB, HSL, and CSS colour names with live preview.
- vpn_key
JWT Decoder
Decode JWT tokens to inspect header, payload, and signature claims client-side.
- tag
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.
- article
Markdown Preview
Write Markdown and see the live HTML preview side by side.
- difference
Text & JSON Diff Checker
Compare two texts or JSON objects line-by-line and highlight differences.
- code
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify compressed CSS for readability.
- html
HTML Formatter & Minifier
Beautify messy HTML or minify it for production deployment.
- schedule
Cron Expression Parser
Parse and describe cron expressions in plain English with next run times.
- travel_explore
IP Address Lookup
Look up your public IP address, location, ISP, and network details.
Why Use Our Developer Tools?
Know what leaves your device
Local text operations do not upload the input. IP lookup uses an external API. Use dummy values instead of production credentials or sensitive payloads.
Instant & Offline
Tools load instantly and work offline after the first page load. No API rate limits, no authentication, no account required.
Developer-First UX
Copy buttons on all outputs, syntax-highlighted JSON, regex match highlighting, live color preview — built with developer workflows in mind.