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
Browser-Based JSON to CSV Workflows with Toolcli for Engineering Teams
When you need to turn complex JSON payloads into CSV or Excel-friendly tables directly in the browser, toolcli provides a privacy-first, client-side workbench that lets engineers quickly inspect schemas, flatten nested data, and download clean CSV without server-side processing.
Browser-Based JSON Parsing with Toolcli for Inspecting API Payloads
Developers drowning in messy API responses, logs, and config payloads need a safe way to parse and inspect JSON directly in the browser. This guide shows how toolcli’s online JSON parser turns those raw blobs into navigable trees, syntax‑checked views, and quickly extracted fields.
Semantic JSON Diff in the Browser: Comparing API Responses and Config Files Safely
When two JSON payloads change across API versions or environments, a browser‑based semantic Json Diff helps you see real structural and value differences, then extend the same comparison into CLI and patch workflows without leaking sensitive data beyond the client.