Privacy-first
Local-first, with network tools clearly marked
Know your tools instantly
Convert, inspect, and ship faster with toolcli
Text, data, time, colour, security, and generator utilities live in a single workspace so you always know where to go for quick fixes.
High performance
Edge-accelerated delivery
Multi-language & themes
English/Chinese with light/dark modes
Workflow Picks
Featured workflows
01Open workflow →02Open workflow →03Open workflow →
401 / 403 and webhook troubleshooting
API Auth Debugger
Check JSON bodies, diagnose JWT timing issues, and verify HMAC-SHA256 signatures.
Multi-line content processing
List Cleanup & Export
Clean multi-line content, normalize lists, and export reusable formats.
Web image publishing workflow
Responsive Image Publisher
Turn source images into responsive AVIF and WebP assets, ready-to-use picture markup, and one downloadable package.
Tool Picks
Featured tools
JSON Toolkit
Format, compact, or validate JSON payloads.
Batch Image Lab
Compress multiple images in one go with unified settings, previews, and bulk downloads.
Time Studio
Convert timestamps and dates between multiple formats with ease.
Hash Workbench
Generate SHA digests or HMAC signatures for payloads.
Color Lab
Convert between HEX/RGB or generate vibrant palettes instantly.
Identifier Forge
Mint UUIDs, Nano IDs, secure tokens, passwords, or filler text.
Practical guides
From the blog
Using Base64 Studio as a Browser-Based Encoder and Decoder in Developer Workflows
Need to inspect encoded headers, JSON blobs or files without leaving your browser? This guide shows how developers can use toolcli’s Base64 Studio as a free, privacy‑friendly Base64 encoder/decoder for everyday web, API and logging workflows.
Using an Online XML to JSON Formatter for Browser-Based Debugging
Switching between XML backends and JSON-centric clients is common in debugging APIs, logs, and configs. This guide shows how to use a privacy-friendly online XML-to-JSON formatter as a browser-based workbench with instant preview, formatting, and post-conversion checks.
Using Toolcli’s Online JSON Formatter for Fast, Privacy‑Friendly API Debugging
When you’re debugging APIs or cleaning JSON out of logs, you need a fast, private browser-based formatter. This guide shows how Toolcli’s online JSON toolkit formats, validates, edits, and compares JSON locally to streamline everyday developer workflows.