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10 tools · free · no install

Developer tools, without the noise.

Fast, private utilities that run entirely in your browser. No account. No install. No telemetry.

Working with APIs

Format, encode, and diff the requests and responses flowing between services.

{ }

JSON Formatter

Format, validate, and minify JSON data

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URL Encoder/Decoder

Encode or decode URL components

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Diff Checker

Compare two texts and highlight differences

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Working with Data Formats

Convert and validate structured data as it moves between JSON, CSV, and other formats.

{ }

JSON Formatter

Format, validate, and minify JSON data

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±

Diff Checker

Compare two texts and highlight differences

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,→

CSV to JSON

Convert CSV or TSV files to JSON

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Working with Encoding & Media

Encode, decode, and convert binary payloads, images, and text between representations.

64

Base64 Encoder/Decoder

Encode or decode Base64 strings

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URL Encoder/Decoder

Encode or decode URL components

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⬡

Image to Base64

Convert an image file or URL to Base64

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▣

Base64 to Image

Convert a Base64 string to a viewable image

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Working with Databases

Prep data and generate the identifiers that databases and data pipelines run on.

UID

UUID Generator

Generate random UUIDs — v4 (random) or v7 (time-ordered)

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CSV to JSON

Convert CSV or TSV files to JSON

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Working with Authentication & Secrets

Inspect and generate the tokens, encodings, and IDs behind auth flows.

64

Base64 Encoder/Decoder

Encode or decode Base64 strings

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UID

UUID Generator

Generate random UUIDs — v4 (random) or v7 (time-ordered)

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Working with Time

Convert timestamps and coordinate work across timezones.

⏱

Epoch Converter

Convert Unix timestamps to human-readable dates

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TZ

World Time

Compare timezones side-by-side — coordinate calls, interviews, and trips

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Working with Infrastructure & Ops

Timestamps and identifiers for logs, configs, and deploys.

UID

UUID Generator

Generate random UUIDs — v4 (random) or v7 (time-ordered)

→ Open tool
⏱

Epoch Converter

Convert Unix timestamps to human-readable dates

→ Open tool

TinkerTools provides 10 free online utilities organized around the workflows developers actually work in — not technical categories. Each tool runs entirely in your browser for maximum speed and privacy. From formatting JSON and comparing text differences to encoding Base64 strings and converting Unix timestamps, all tools are optimized for speed and ease of use with no installation or setup required.