How to Count Characters Accurately
Learn what character counts include, why spaces matter, and how to check text against common writing limits.
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Format, validate and minify JSON instantly.
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Open toolShrink an image's file size with an adjustable quality slider and see how much you save.
Open toolCount characters, words, sentences, emojis and syllables, set a custom limit, check readability and see live platform limits.
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Call versioned JSON endpoints with a private API key. Create a developer account, test integrations with 100 free credits every month, and track the remaining balance from your dashboard.
API credits are separate from the free browser tools. Credits are charged only after an endpoint completes successfully. Higher-volume pricing may be introduced later; planned paid tiers are clearly marked as coming soon.
curl -X POST \
https://toolsonduty.com/api/v1/hash \
-H "Authorization: Bearer <api-key>" \
-H "Content-Type: application/json" \
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Generate hashes, passwords, tokens and work with JWTs and ciphers.
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Format and validate JSON, encode Base64, count and clean text, generate secure passwords and hashes, calculate percentages, loans and dates, and convert colours, numbers and units. Each tool comes with a clear explanation, examples and answers to common questions, so you can get the result you need and understand how it works.
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Learn what character counts include, why spaces matter, and how to check text against common writing limits.
Read guideUnderstand when to use character count, word count, sentence count, and reading time for different writing tasks.
Read guideA practical guide to formatting, validating, and debugging JSON without changing the underlying data.
Read guideCombine several PDF files in the right order, check the result, and avoid common document-sharing mistakes.
Read guideGood to know
The essentials about privacy, access, browser processing and professional use.
Yes. Public browser tools are free to use without mandatory registration. Developer API access is separate and metered, with 100 free credits each month for testing and small integrations.
Most tools process directly in your browser. Tools that use a network service clearly disclose it on their page before you use them.
No account is required for public browser tools. The Developer API requires an account and private API key so requests, security and monthly credits can be managed.
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Yes. The suite includes developer, document, finance, design, education and business workflows. Always review important output before relying on it professionally.