Decode a JWT Online: Header, Payload and Expiry
Decode a JWT online free. See the header algorithm, payload claims, expiry status in UTC and a readable claim summary. Decoding happens in your browser.
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Format JSON Online: Pretty-Print, Minify and Validate
Format JSON online free: pretty-print with 2, 4 or 8 spaces, minify in one click, and get a clear error for invalid input. Runs in your browser.
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Image Color Palette Extractor: HEX Colors From Images
Extract the dominant colors from any image free. Get a ranked HEX palette with the percentage each color covers, ready to paste into a design tool.
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JFIF to PNG Converter: What a JFIF File Really Is
Convert JFIF to PNG online free. A JFIF file is a JPEG under another name, so the PNG keeps the dimensions but may be larger and gains no transparency.
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JPG to PNG Converter: When It Helps and When It Doesn't
Convert JPG to PNG online free in one click. The PNG keeps the original dimensions and adds no further loss, but cannot restore detail JPEG discarded.
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JSON to Go Struct: Generate Types With JSON Tags
Generate Go structs from JSON free. Get int64, float64, pointers for optional fields, json tags, and nested types using only the standard library.
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JSON to Rust Struct: Generate Serde Types From a Sample
Generate Rust structs from JSON free. Get serde derives or Debug/Clone, snake_case fields with rename attributes, Vec and Option types, ready to paste.
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JSON to Zod Schema: Generate a Validator From JSON
Turn JSON into a Zod schema free. Get z.object types with optional, nullable and array handling, plus the inferred TypeScript type and the npm command.
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AI Logo Remover: What It Can and Can't Remove
Remove corner logos and watermarks from up to 5 images free. It detects the region, fills it from nearby pixels, then returns everything as one ZIP.
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Build an AI Chatbot Persona That Actually Holds Up
Build a chatbot persona free: system prompt, persona card, guardrails and sample dialogue from one form. No AI API call, and the output is yours to edit.
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Audio Bitrate Reducer: Shrink Files Without Guessing
Re-encode MP3, M4A, Opus, FLAC or WAV at a lower bitrate and see the real before-and-after file sizes. Free, with auto or manual rate and mono or stereo.
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Canonical Tag Builder: Fix Duplicate URLs
Build a rel=canonical tag, see every URL variant that reaches the same page, and catch http, www, trailing-slash and tracking-parameter conflicts.
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