utility tools

Tools · Agents · Builder

Small tools. Immediate answers.

Calculate, convert, format, inspect, and export without an account or a heavyweight app. Most tools run privately in your browser, with network behavior labeled before you use it.

Building an agent or automation? The same deterministic logic is available through documented HTTP and MCP endpoints with predictable schemas and typed errors. What is Utilito?

For peopleUse a free toolOpen any of 212 browser tools. No account. Most work stays on your device.For agentsConnect MCP or APIInstall hosted MCP, run the connection doctor, then make one verified first call.For buildersSee Builder PilotHigher route limits and setup help for Context, Artifact, and Contract Ops.

Three jobs Utilito is for

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RecoverFix bad model outputRepair malformed JSON or tool output and keep exact change evidence.ContextShrink agent contextSelect, budget, and package only the context a model needs next.ContractsValidate contractsGate schemas, fixtures, and tool-call shapes before another retry.

Start with the job

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WorkflowRepair structured outputTurn malformed or invalid structured output into reviewed JSON and validate the resulting tool-call shape.WorkflowPrepare data and logsInspect pasted data or logs, convert tabular records, and trim noisy context.WorkflowBuild agent contextSelect, shrink, budget, and package bounded context for an agent handoff.WorkflowValidate contracts and fixturesDraft and convert strict tool schemas, then reconcile 1–5 related contracts against shared submitted fixtures in one portfolio release packet.WorkflowCreate diagrams and reportsRender a reviewed flowchart and turn bounded context into a downloadable report.WorkflowEveryday browser utilitiesReach common calculation, conversion, time, and encoding tools without knowing their names.

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Text16 tools Color8 tools Code27 tools Math16 tools Generator22 tools Security3 tools SEO18 tools AI32 tools Developer17 tools Image20 tools Network2 tools Convert8 tools Hashing & IDs6 tools PDF8 tools Finance7 tools Health2 tools

Useful starting points

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Everyday tools

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JSON FormatterFormat, minify, and validate JSON. Catch errors instantly.Word CounterCount words, characters, sentences, and paragraphs instantly in your browser.Color ConverterConvert between HEX, RGB, HSL, and CMYK. Pick a color to start.Image CompressorCompress JPG, PNG, and WebP images locally with no upload.PDF MergerMerge multiple PDF files into one combined PDF in your browser.Password GeneratorGenerate strong random passwords with custom length and character sets.

Builder starters

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JSON RepairRepair malformed JSON locally with an audit log.Tool Calling ValidatorValidate OpenAI, Anthropic, and agent tool calls against deterministic function-calling JSON structure.Context WorkbenchRepair, query, shrink, compare, and compose model context.Token CounterEstimate tokens, words, characters, and prompt size for GPT and Claude-style LLM prompts.JWT DecoderDecode JSON Web Tokens to inspect header, payload, and signature.UUID GeneratorGenerate UUID v4 tokens. One or many at once.