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
Online Base64 Encoder Decoder in the Browser for Developers
When you’re debugging APIs, JWTs, or log output, a privacy‑first, browser‑only Base64 encoder/decoder can replace throwaway scripts and unsafe web tools. This guide shows how to use toolcli.com to encode/decode text, JSON, files, and images locally, handle Base64 vs Base64URL correctly, and avoid common mistakes.
Node.Js Download and Installation Guide for Reliable Local Development
When you need a reliable local runtime for modern front‑end builds or back‑end APIs, choosing the right Node.js download and installer matters. This guide walks through selecting the correct LTS version from nodejs.org, installing Node and npm on Windows, macOS, and Linux, validating with node -v / npm -v, and complementing local work with online tools like toolcli.
Decoding JWTs Safely in the Browser with a Privacy-Friendly Frontend Tool
When you’re debugging tokens in the browser, you need to decode JWTs quickly without leaking sensitive data. This guide focuses on privacy-friendly, fully client-side JWT decoding workflows with toolcli, and how to use them safely for API debugging and log analysis.