Toolblip is a free collection of 490+ online developer tools that run entirely in your browser. Format JSON, encode Base64, generate QR codes, count words, and more without signup or uploads.
• 490+ free developer tools
• JSON formatting, Base64 encoding, QR generation, and word counting
• Runs locally in your browser with no signup or data uploads
Developers, students, writers, and anyone who needs quick, private utilities for everyday work.


We publish a free embeddable lookup tool for healthcare billing, so the question I care about: does each Toolblip tool have a stable, embeddable URL? An iframe-able version of the QR and JSON formatters would let help-center pages drop them in without sending users off-site, and that is where a lot of durable inbound links come from for free tools.
The no-upload, runs-locally angle is the real differentiator here - pasting JWTs or config with secrets into a random online formatter is how tokens leak. 490 tools in one place also solves the bookmark problem. One suggestion: a way to deep-link a tool with preset input would make these great for sharing in bug reports and docs.
Doing everything in the browser is the right call, and it opens a door you may not have used yet: if the site ships a service worker and a manifest, 490 tools become installable and keep working with the network off. I did the same on my own site and the install prompt costs about thirty lines. That would also answer the "which tools work offline" question someone raised above — with a real service worker the honest answer becomes "all the ones that don't call a web API", and you can grey out the rest when navigator.onLine is false.
With 490+ tools the discoverability of each utility matters as much as the tools themselves — a command palette or fuzzy search across all utilities would save a lot of clicking. Local-only processing is the real differentiator here: formatting a large JSON payload without it ever leaving the browser is a genuine privacy win over the big-name formatters. Curious whether the QR generator supports bulk generation from a CSV, that's a common ask for event teams.

490 tools in one place is genuinely useful, especially with processing kept in the browser. As the collection grows, discovery could become the bottleneck. A keyboard-first command palette with fuzzy search, recent tools, and favorites would make it much faster to jump between common tasks such as JSON formatting and Base64 conversion.
The browser-only approach and no-signup workflow are a great fit for quick debugging. Having JSON formatting, Base64, QR generation, and word counting in one lightweight toolkit should be handy when switching between tasks. The no-upload model is especially appealing—are there plans for shareable links or saved presets?
490+ tools running entirely client-side is the right call — no upload and no signup makes it usable on a locked-down work laptop where you cannot install anything. The hard part with a catalogue this size is discovery: a command palette (⌘K) that fuzzy-searches tool names would beat scrolling category pages. A locally-pinned 'recently used' row would help repeat visits too, since most people return to the same three or four tools.
490+ tools entirely client-side is impressive — curious how you're scoping that. We run into a hard wall with formats that genuinely need a real desktop engine (legacy binary Office files, OCR, some image formats like PSD) — WASM/JS can't losslessly handle those, so we ended up running a server-side path for ~40% of our tools rather than claim pure-browser everywhere. Are those simply out of scope for Toolblip, or is there a server fallback for the ones a browser can't do?
The privacy pitch here is exactly right for anyone pasting real production data into a formatter — I'd never trust a hosted JSON tool with an actual API response that has customer records in it, but "runs in your browser" removes that hesitation entirely. Would be worth stating explicitly on each tool page ("nothing you paste ever leaves this tab"), since that's the kind of claim people want confirmed before they paste something sensitive, not assumed.
490+ tools without signup is the right call for something this utilitarian - the friction of creating an account just to format JSON once is real. Curious how you're handling tool discovery at that scale though; a fuzzy search or recently-used list would help a lot once someone's past their first 10 tools.
490+ tools without signup is the right call for something this utilitarian - the friction of creating an account just to format JSON once is real. Curious how you're handling tool discovery at that scale though; a fuzzy search or recently-used list would help a lot once someone's past their first 10 tools.

The part I would actually use is that these tools stay in the browser with no upload. I often need to pretty-print a payload or make a QR for a staging URL without sending it to another SaaS. Does the JSON tool keep an option for comments and trailing commas, or does it only accept strict JSON? That is the case that usually breaks my paste. Also curious if the word counter treats Markdown code fences as text or skips them.




We publish a free embeddable lookup tool for healthcare billing, so the question I care about: does each Toolblip tool have a stable, embeddable URL? An iframe-able version of the QR and JSON formatters would let help-center pages drop them in without sending users off-site, and that is where a lot of durable inbound links come from for free tools.
The no-upload, runs-locally angle is the real differentiator here - pasting JWTs or config with secrets into a random online formatter is how tokens leak. 490 tools in one place also solves the bookmark problem. One suggestion: a way to deep-link a tool with preset input would make these great for sharing in bug reports and docs.
Doing everything in the browser is the right call, and it opens a door you may not have used yet: if the site ships a service worker and a manifest, 490 tools become installable and keep working with the network off. I did the same on my own site and the install prompt costs about thirty lines. That would also answer the "which tools work offline" question someone raised above — with a real service worker the honest answer becomes "all the ones that don't call a web API", and you can grey out the rest when navigator.onLine is false.
With 490+ tools the discoverability of each utility matters as much as the tools themselves — a command palette or fuzzy search across all utilities would save a lot of clicking. Local-only processing is the real differentiator here: formatting a large JSON payload without it ever leaving the browser is a genuine privacy win over the big-name formatters. Curious whether the QR generator supports bulk generation from a CSV, that's a common ask for event teams.

490 tools in one place is genuinely useful, especially with processing kept in the browser. As the collection grows, discovery could become the bottleneck. A keyboard-first command palette with fuzzy search, recent tools, and favorites would make it much faster to jump between common tasks such as JSON formatting and Base64 conversion.
The browser-only approach and no-signup workflow are a great fit for quick debugging. Having JSON formatting, Base64, QR generation, and word counting in one lightweight toolkit should be handy when switching between tasks. The no-upload model is especially appealing—are there plans for shareable links or saved presets?
490+ tools running entirely client-side is the right call — no upload and no signup makes it usable on a locked-down work laptop where you cannot install anything. The hard part with a catalogue this size is discovery: a command palette (⌘K) that fuzzy-searches tool names would beat scrolling category pages. A locally-pinned 'recently used' row would help repeat visits too, since most people return to the same three or four tools.
490+ tools entirely client-side is impressive — curious how you're scoping that. We run into a hard wall with formats that genuinely need a real desktop engine (legacy binary Office files, OCR, some image formats like PSD) — WASM/JS can't losslessly handle those, so we ended up running a server-side path for ~40% of our tools rather than claim pure-browser everywhere. Are those simply out of scope for Toolblip, or is there a server fallback for the ones a browser can't do?
The privacy pitch here is exactly right for anyone pasting real production data into a formatter — I'd never trust a hosted JSON tool with an actual API response that has customer records in it, but "runs in your browser" removes that hesitation entirely. Would be worth stating explicitly on each tool page ("nothing you paste ever leaves this tab"), since that's the kind of claim people want confirmed before they paste something sensitive, not assumed.
490+ tools without signup is the right call for something this utilitarian - the friction of creating an account just to format JSON once is real. Curious how you're handling tool discovery at that scale though; a fuzzy search or recently-used list would help a lot once someone's past their first 10 tools.
490+ tools without signup is the right call for something this utilitarian - the friction of creating an account just to format JSON once is real. Curious how you're handling tool discovery at that scale though; a fuzzy search or recently-used list would help a lot once someone's past their first 10 tools.

The part I would actually use is that these tools stay in the browser with no upload. I often need to pretty-print a payload or make a QR for a staging URL without sending it to another SaaS. Does the JSON tool keep an option for comments and trailing commas, or does it only accept strict JSON? That is the case that usually breaks my paste. Also curious if the word counter treats Markdown code fences as text or skips them.
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