How to choose PNG, JPG, or WebP before you convert a file
A practical decision guide for screenshots, photos, logos, and web assets so you pick the right format before uploading.
7 min read
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Guides and workflows
Longer articles on formats, documents, timestamps, and data conversion. Written for people using the tools, not for site owners tuning layouts.
Image formats
Guides that pair with the tools on Utilido. Start with an article, then open a converter when you are ready.
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Why client-side image conversion matters for everyday file tasks
What runs in your browser during a convert step, what still touches the network, and how to describe privacy accurately.
7 min read
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Browser WASM and privacy for developers who ship in-tab tools
How WebAssembly fits client-side utilities, what threat models it does not solve, and how to document behavior for security review.
8 min read
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PDF workflows
Guides that pair with the tools on Utilido. Start with an article, then open a converter when you are ready.
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PDF merge and split: a page-order checklist before you send
Avoid wrong page order, rotated scans, and off-by-one splits with a short pre-flight list before you merge or extract PDF pages.
7 min read
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PDF merge, split, and watermark without a cloud upload step
A practical path for contracts and scans when you want PDF edits to run in the browser and avoid an extra copy on a random converter site.
7 min read
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Developer data
Guides that pair with the tools on Utilido. Start with an article, then open a converter when you are ready.
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CSV and JSON round trips without breaking rows or types
Headers, quoting, nested fields, Excel exports, and a repeatable workflow so CSV to JSON and back stays faithful to your data.
8 min read
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Markdown structure to verify before you publish
Headings, lists, fences, and spacing that break when copying between apps, plus a preview checklist before CMS or repo publish.
7 min read
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Hash digests vs encryption: what the hash generator shows
Checksums detect change; they do not hide data. When SHA-256 helps locally, and when you need encryption or password hashing instead.
7 min read
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JWT claims to check before you trust a token
Header alg, exp, aud, and iss fields worth reading during API integration, plus a decode-first checklist that does not replace signature verification.
7 min read
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Strong passwords without reusing secrets across sites
Length, randomness, and storage habits that pair well with a local generator and a password manager vault.
9 min read
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Base64 in config files and logs: encode, decode, and sanity-check
Standard vs URL-safe Base64, padding, data URLs, and how to inspect encoded config without treating encoding as encryption.
8 min read
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A JSON debug checklist after API or config changes
A local validation workflow for syntax, shape, diffs, and sample rows before JSON reaches staging, clients, or CSV imports.
8 min read
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Time and logs
Guides that pair with the tools on Utilido. Start with an article, then open a converter when you are ready.
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Unix timestamps: telling seconds from milliseconds in logs
Why epoch values land in 1970 or the far future, and how to sanity-check timestamps from APIs, databases, and mobile clients.
8 min read
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Timezone handoffs for remote teams without mental math
Use IANA city zones, daylight saving aware labels, and shared overlap windows before you send invites or write specs across countries.
7 min read
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