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
How Developers Use Toolcli’s Base64 Tool to Debug APIs and Frontend Assets
When you’re debugging APIs or front‑end payloads, toolcli’s in‑browser Base64 utility lets you safely encode and decode text, JWT-style Base64URL data, and file blobs without sending logs off your machine, giving you a private, fast workflow for everyday Base64 troubleshooting.
Base64 Decoder and Encoder: a Practical Web Guide for Developers
When debugging APIs, JWTs, or encoded config values, an online Base64 Decoder and Encoder can be faster than writing one‑off scripts. This guide shows developers how to safely use browser‑only Base64 and Base64URL tools, avoid common pitfalls, and verify payloads reliably.
Decode from Base64 in the Browser: an Online Workflow for Logs, API Responses, and JWTs
When debugging APIs, JWTs, or data URIs, you often just need to Decode From Base64 directly in the browser. This guide shows how an in‑browser Base64 decoder online turns opaque payloads into readable text or downloadable files without writing code.