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Text, data, time, colour, security, and generator utilities live in a single workspace so you always know where to go for quick fixes.

Explore workflows Browse all tools

Privacy-first

Local-first, with network tools clearly marked

High performance

Edge-accelerated delivery

Multi-language & themes

English/Chinese with light/dark modes

401 / 403 and webhook troubleshooting

API Auth Debugger

Check JSON bodies, diagnose JWT timing issues, and verify HMAC-SHA256 signatures.

Open workflow →02

Multi-line content processing

List Cleanup & Export

Clean multi-line content, normalize lists, and export reusable formats.

Open workflow →03

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.

Open workflow →

JSON Toolkit

Format, compact, or validate JSON payloads.

Data & APIsLocal processingHistory

Batch Image Lab

Compress multiple images in one go with unified settings, previews, and bulk downloads.

Design & VisualsLocal processingBatch

Time Studio

Convert timestamps and dates between multiple formats with ease.

Date & TimeLocal processing

Hash Workbench

Generate SHA digests or HMAC signatures for payloads.

Security & HashingLocal processing

Color Lab

Convert between HEX/RGB or generate vibrant palettes instantly.

Design & VisualsLocal processingAuto-run

Identifier Forge

Mint UUIDs, Nano IDs, secure tokens, passwords, or filler text.

GeneratorsLocal processing

Encoder Decoder Base64 · 8 min read

Using Toolcli Base64 Studio for Browser‑Only Encoding and Decoding in API Debugging

When you’re debugging APIs, headers, or log payloads, you often need a trustworthy Base64 encoder/decoder that keeps data local. toolcli’s Base64 Studio offers browser‑only, privacy‑friendly Base64 transformations for text, binary snippets, and URL‑safe variants without any uploads.

Best Json Formatter And Json Validator: Online Json Formatter · 8 min read

Best JSON Formatter and Validator for Web-Based Debugging Workflows

When API responses turn into unreadable JSON blobs, an online formatter and validator becomes a core debugging tool. This guide shows developers how to use a browser-based beautifier, viewer, editor, and converter to validate payloads and streamline workflows.

Base64 Image Encoder Decoder · 8 min read

Base64 Image Encoder Decoder in the Browser: Workflows for Frontend and API Debugging

When you’re debugging front-end code or API responses, you often need to flip images to and from Base64 entirely in the browser. This guide shows how toolcli’s privacy-friendly Base64 Image Encoder Decoder streamlines HTML/CSS inlining, API payload checks, and lightweight optimization.